Antimony

Atomic number

51

Atomic mass (u)

121.760

Category

Metalloid

Standard state

Solid

Melting point

630.63 °C (903.78 K)

Boiling point

1586.85 °C (1860 K)

Density (g/cm³)

6.685

Electronegativity (Pauling)

2.05

Electron configuration

[Kr]5s2 4d10 5p3

Oxidation states

+5, +3, -3

Atomic radius (pm)

206

First ionization energy (eV)

8.64

Discovery & recognition

Discovery year / period (PubChem)

Ancient

Discovery credited to (RSC)

No individual discoverer recorded by this source

Date or period recorded by RSC

approx 1600BC

Discovery place

Known since antiquity; no single first-discovery place is established.

An ancient date does not identify a first human discovery. Different references may date observation, isolation and formal recognition differently.

Natural occurrence & production

The creation of an element’s nuclei and its concentration into terrestrial deposits are different processes. The occurrence note below concerns its presence or production on Earth; it is not a complete account of nucleosynthesis.

“Antimony is not an abundant element but is found in small quantities in over 100 mineral species.”

Royal Society of Chemistry · occurrence excerpt ↗

Continue the research

Reference values are not product specifications. Blank values have not been estimated. For superheavy elements, some properties and family assignments are theoretical or incompletely measured.