Arsenic

Arsenic, ₃₃As

Arsenic
Pípè	/ˈɑːrsnɪk/ (ARS-nik) as an adjective: /ɑːrˈsɛnɪk/ (ar-SEN-ik)
Ìhànsójú	metallic grey
Ìwúwo átọ̀mù Ar, std(As)	74.921595(6)[1]
Arsenic ní orí tábìlì àyè
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson P ↑ As ↓ Sb germanium ← arsenic → selenium
Nọ́mbà átọ̀mù (Z)	33
Ẹgbẹ́	group 15 (pnictogens)
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntì	Metalloid
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 3d10 4s2 4p3
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 5
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Sublimation point	887 K ​(615 °C, ​1139 °F)
Kíki (near r.t.)	5.727 g/cm3
when liquid (at m.p.)	5.22 g/cm3
Triple point	1090 K, ​3628 [2] kPa
Critical point	1673 K, ? MPa
Heat of fusion	(grey) 24.44 kJ/mol
Heat of	? 34.76 kJ/mol
Molar heat capacity	24.64 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 553 596 646 706 781 874
Atomic properties
Oxidation states	−3, −2, −1, 0,[3] +1,[4] +2, +3, +4, +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 2.18
energies	(more)
Atomic radius	empirical: 119 pm
Covalent radius	119±4 pm
Van der Waals radius	185 pm
Color lines in a spectral range Spectral lines of arsenic
Other properties
Natural occurrence	primordial
Crystal structure	​rhombohedral
Thermal conductivity	50.2 W/(m·K)
Electrical resistivity	333 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic[5]
Young's modulus	8 GPa
Bulk modulus	22 GPa
Mohs hardness	3.5
Brinell hardness	1440 MPa
CAS Number	7440-38-2
Main isotopes of arsenic
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 73As syn 80.3 d ε - 73Ge γ 0.05D, 0.01D, e - 74As syn 17.78 d ε - 74Ge β+ 0.941 74Ge γ 0.595, 0.634 - β− 1.35, 0.717 74Se 75As 100% 75As is stable with 42 neutrons
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