Antimony

Antimony, ₅₁Sb

Antimony
Pípè	UK /ˈæntᵻməni/ (AN-tə-mə-nee) US /ˈæntᵻmoʊni/ (AN-tə-moh-nee)
Ìhànsójú	silvery lustrous gray
Ìwúwo átọ̀mù Ar, std(Sb)	121.760(1)
Antimony 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 As ↑ Sb ↓ Bi tin ← antimony → tellurium
Nọ́mbà átọ̀mù (Z)	51
Ẹgbẹ́	group 15 (pnictogens)
Àyè	àyè 5
Àdìpọ̀	Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntì	Metalloid
Ìtò ẹ̀lẹ́ktrọ́nù	[Kr] 4d10 5s2 5p3
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 18, 5
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	903.78 K ​(630.63 °C, ​1167.13 °F)
Ígbà ìhó	1860 K ​(1587 °C, ​2889 °F)
Kíki (near r.t.)	6.697 g/cm3
when liquid (at m.p.)	6.53 g/cm3
Heat of fusion	19.79 kJ/mol
Heat of	193.43 kJ/mol
Molar heat capacity	25.23 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 807 876 1011 1219 1491 1858
Atomic properties
Oxidation states	−3, −2, −1, 0, +1, +2, +3, +4, +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 2.05
energies	(more)
Atomic radius	empirical: 140 pm
Covalent radius	139±5 pm
Van der Waals radius	206 pm
Spectral lines of antimony
Other properties
Natural occurrence	primordial
Crystal structure	​rhombohedral
Speed of sound thin rod	3420 m/s (at 20 °C)
Thermal expansion	11 µm/(m·K) (at 25 °C)
Thermal conductivity	24.4 W/(m·K)
Electrical resistivity	417 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	55 GPa
Shear modulus	20 GPa
Bulk modulus	42 GPa
Mohs hardness	3.0
Brinell hardness	294 MPa
CAS Number	7440-36-0
Main isotopes of antimony
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 121Sb 57.36% 121Sb is stable with 70 neutrons 123Sb 42.64% 123Sb is stable with 72 neutrons 125Sb syn 2.7582 y β− 0.767 125Te

Antimony (Látìnì: stibium) is a chemical element with symbol Sb and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb₂S₃). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead. It was established to be an element around the 17th century.