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
	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)
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
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

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.