51Sb

Antimony

Metalloid

Antimony (Sb) is element 51, a metalloid, in period 5 and group 15 of the periodic table. Its standard atomic weight is 121.76, it melts at 630.63 °C and boils at 1587 °C. It has been known since antiquity.

Atomic Number51

SymbolSb

NameAntimony

Atomic Weight121.76 u

CategoryMetalloid

Period5

Group15

Melting Point630.63 °C

Boiling Point1587 °C

Density6.685 g/cm³

Electron Config[Kr] 4d10 5s2 5p3

Discovered ByKnown since antiquity

More Metalloids