The chemical symbol for Barium is Ba. Atomic radii can be measured by measuring the distance between the nuclei of atoms in a metal. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. The chemical symbol for Germanium is Ge. Titanium can be used in surface condensers. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. CBSE CBSE Class 10. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. The chemical symbol for Calcium is Ca. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The valence 5s electrons in Sr have n = 5 as compared to the valence 2s electrons in Be having n = 2, so Sr should have a larger atomic radius than Be. The chemical symbol for Astatine is At. Butterworth-Heinemann. The chemical symbol for Radium is Ra. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The chemical symbol for Samarium is Sm. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Atomic radius, half the distance between the nuclei of identical neighbouring atoms in the solid form of an element. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Atomic radius: Atomic radius is the measurement of the distance between the atomic nucleus and the outermost shell. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Atomic and ionic radii are found by measuring the distances between atoms and ions in chemical compounds. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. The chemical symbol for Dysprosium is Dy. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Cerium is the second element in the lanthanide series. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. The chemical symbol for Hafnium is Hf. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. It has an estimated density of 40.7 x 103 kg/m3. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Neodymium is a soft silvery metal that tarnishes in air. The atomic radius of the hydrogen atom is about 53 picometers. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. The chemical symbol for Europium is Eu. Trends in atomic radius in Periods 2 and 3. atomic radius of n, The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons. The chemical symbol for Nickel is Ni. The chemical symbol for Actinium is Ac. Atomic Radius Unlike a ball, an atom does not have a fixed radius. It is the fourth most common element in the Earth’s crust. The chemical symbol for Technetium is Tc. Learn atomic radius trend with free interactive flashcards. The chemical symbol for Praseodymium is Pr. The chemical symbol for Silver is Ag. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. SURVEY . Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Its properties are thus intermediate between those of chlorine and iodine. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. their atomic number. The Cookies Statement is part of our Privacy Policy. Uranium is a silvery-white metal in the actinide series of the periodic table. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. The chemical symbol for Zirconium is Zr. The chemical symbol for Gold is Au. Logic and Solution: The reported radii of noble gas elements are "van der Waals radii", which are 40% more than the actual atomic radii. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Use a periodic table to help you answer the following questions. The radius of an atom is not a uniquely defined property and depends on the definition. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! Under standard conditions, it is the lightest metal and the lightest solid element. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Since the square of the distance is inversely proportional to the force of attraction, lattice energy decreases as the atomic radius increases. It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. The densest material found on earth is the metal osmium, but its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. The chemical symbol for Tin is Sn. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. The atomic radius is the distance from the atomic nucleus to the outermost stable electron of a neutral atom. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The information contained in this website is for general information purposes only. Tungsten is an intrinsically brittle and hard material, making it difficult to work. The value of the atomic radius of an element gives a measure of its atomic size. Major advantage of lead shield is in its compactness due to its higher density. Therefore, the correct option is Li that is option (a). This trend is most apparent when restricted to a row on the periodic table. The above values are based on. The chemical symbol for Ytterbium is Yb. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. d) None of these . The ionic radius is half the distance between two gas atoms that are just touching each other. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. What is Uranium in the Environment - Definition, What is Atomic and Nuclear Physics - Definition, What is Atomic and Nuclear Structure - Definition, What is Radius and Density of Atomic Nucleus - Definition. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. In nuclear reactors, promethium equilibrium exists in power operation. Note: All measurements given are in picometers (pm). The increase in atomic radii is due to the electron shielding but the situation is quite complex as the principal quantum number n is not constant. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). An atom has no rigid spherical boundary, but it may be thought of as a tiny, dense positive nucleus surrounded by a diffuse negative cloud of electrons. From left to right in the Modern Periodic table, the atomic radii decrease with increasing the atomic number. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. The chemical symbol for Zinc is Zn. Atomic radius decreases as new electrons are added within the same orbital. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. The volume of an atom is about 15 orders of magnitude larger than the volume of a nucleus. The chemical symbol for Nobelium is No. For example, in the bromine molecule, the distance between the two nuclei is known to be 228 pm. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. It is a soft, silvery-white alkali metal. The atomic radius is half the diameter of a neutral atom. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. But this “huge” space is occupied primarily by electrons, because the nucleus occupies only about 1721×10−45 m3 of space. The chemical symbol for Oxygen is O. The Van der Waals radius, rw, of an atom is the radius of an imaginary hard sphere representing the distance of closest approach for another atom. For instance, the radii generally decrease rightward along each period (row) of the table, from the alkali metals to the noble gases; and increase down each group (column). The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Only about 5×10−8% of all matter in the universe is europium. 2) You may not distribute or commercially exploit the content, especially on another website. Iron is a metal in the first transition series. Lead is a heavy metal that is denser than most common materials. Hence, the values of atomic radii given here in picometers can be converted to atomic units by dividing by 53, to the level of accuracy of the data given in this table. Caesium has physical and chemical properties similar to those of rubidium and potassium. Chemistry of the Elements (2nd ed.). Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. The symbols W, X, Y, and Z represent four elements shown on the outline of a periodic table. The atomic radius (r) of an atom can be defined as one half the distance (d) between two nuclei in a diatomic molecule. Chlorine is a yellow-green gas at room temperature. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). The chemical symbol for Fermium is Fm. It is occasionally found in native form as elemental crystals. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Atomic radius, half the distance between the nuclei of identical neighbouring atoms in the solid form of an element. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. These electrons together weigh only a fraction (let say 0.05%) of entire atom. The ions F-, O 2-and N 3-are isoelectronic (same number of electrons) and belongs to the same period (Period 2). Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. The chemical symbol for Tantalum is Ta. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. is a rare earth element with a metallic silver luster. The chemical symbol for Rubidium is Rb. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Carbon is one of the few elements known since antiquity. As one travels down a group, another s shell is added, meaning that electrons are added in another orbit farther from the nucleus. The value of atomic radii Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. The atomic radii of the element of second period are given below Second period element B Be O N Li F C Atomic Radii pm 88 111 66 74 152 64 77 a Arrang - Chemistry - TopperLearning.com | 9b6co3ugg Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. If you continue to use this site we will assume that you are happy with it. Choose from 500 different sets of atomic radius trend flashcards on Quizlet. It occurs on Earth as the decay product of various heavier elements. Question Papers 886. 1) You may use almost everything for non-commercial and educational use. Q. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. On the periodic table, atomic radius generally decreases as you move from left to right across a period (due to increasing nuclear charge) and increases as you move down a group (due to the increasing number of electron shells). Atomic Radius: The atomic radius of each element depends on the distance from nucleus of the element to the electrons present in the outer shell. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. It is a noble metal and a member of the platinum group. Atomic radii decrease from left to right across a period and increase from top to bottom in a group. How atomic radius is defined, and trends across a period and down a group. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. In practice, the value is obtained by measuring the diameter of an atom and dividing it in half. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. For more recent data on covalent radii see Covalent radius. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Gold is a transition metal and a group 11 element. The radii of neutral atoms range from 30 to 300 pm or trillionths of a meter. It may seem reasonable to say that it is due to the successive addition of the electrons. The chemical symbol for Helium is He. Difference between empirical and experimental data: Empirical data basically means, "originating in or based on observation or experience" or "relying on experience or observation alone often without due regard for system and theory data". Neptunium metal is silvery and tarnishes when exposed to air. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Therefore the space in an atom (between electrons and an atomic nucleus) is not empty, but it is filled by a probability density function of electrons (usually known as  “electron cloud“). The chemical symbol for Uranium is U. The atomic radius of Nitrogen atom is 71pm (covalent radius). Particle locations in quantum mechanics are not at an exact position, they are described by a probability density function. Radon is a radioactive, colorless, odorless, tasteless noble gas. Because of its high chemical reactivity, barium is never found in nature as a free element. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. Neptunium is the first transuranic element. Greenwood, Norman N.; Earnshaw, Alan (1997). Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Figure 1. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. These trends of the atomic radii (and of various other chemical and physical properties of the elements) can be explained by the electron shell theory of the atom; they provided important evidence for the development and confirmation of quantum theory. The Standard English unit is pounds mass per cubic foot (lbm/ft3). The chemical symbol for Sodium is Na. A freshly exposed surface of pure copper has a reddish-orange color. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). Density is defined as the mass per unit volume. The chemical symbol for Thorium is Th. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Bihar board sent up exam 2021 will begin from 11th November 2020. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius. - The atomic radius increases as you move down a group. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. Fermium is a member of the actinide series. The chemical symbol for Krypton is Kr. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. The chemical symbol for Radon is Rn. The chemical symbol for Lanthanum is La. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. Atomic radii increase from left to right across a period and decrease from top to bottom in a group. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The atomic radius of Nitrogen atom is 71pm (covalent radius). Where . n = prinicipal quantum number of orbit. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. The value of atomic radii 1) n=2, Li 2+ 2) n=2, Be 3+ 3) n=2, He + 4) n=3, Li 2+ Logic: Radius of Bohr's orbit in hydrogen and hydrogen like species can be calculated by using the following formula. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Periodicity Worksheet. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. No matter what criteria you use to describe the atomic radius, the size of an atom is dependent on how far out its electrons extend. The reason is equally obvious - you are adding extra layers of electrons. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. The chemical symbol for Curium is Cm. The chemical symbol for Argon is Ar. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. The chemical symbol for Tellurium is Te. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Platinum is one of the least reactive metals. The chemical symbol for Einsteinium is Es. Atomic radius of N = 70 pm Atomic radius of O = 73 pm In general atomic radius of elaments in a period decreases from left to right due to increase of nuclear charge. The chemical symbol for Gadolinium is Gd. It is an intensive property, which is mathematically defined as mass divided by volume: In words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Depending on the definition, the term may apply only to isolated atoms, or also to atoms in condensed matter, covalently bound in molecules, or in ionized and excited states; and its value may be obtained through experimental measurements, or computed from theoretical models. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The chemical symbol for Caesium is Cs. Its boiling point is the lowest among all the elements. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Tags: Question 4 . al. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. The chemical symbol for Neptunium is Np. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. The chemical symbol for Indium is In. So, Li has the largest atomic radius. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. The atomic radius of the elements increases as we go from right to left across a period and as we go down the periods in a group. The Bohr radius is consequently known as the "atomic unit of length". Textbook Solutions 17467. Atomic radii vary in a predictable and explicable manner across the periodic table. Trends in atomic radius down a group. Figure 1 shows the sizes of a select group of elements arranged according to their positions in the periodic table, i.e. The chemical symbol for Lead is Pb. The chemical symbol for Cerium is Ce. The atomic radius of a chemical element is the distance from the centre of the nucleus to the outermost shell of an electron. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure.

atomic radius of n

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