Symbol Sb
Atomic Number 51
Atomic Mass 121.760 g.mol -1
Discoverey approx 1600 BC

Chemical Properties of Antimony

Group 15 Melting point 630.628°C, 1167.13°F, 903.778 K
Period 5 Boiling point 1587°C, 2889°F, 1860 K
Block p Density (g cm−3) 6.68
Atomic number 51 Relative atomic mass 121Sb
State at 20°C Solid Key isotopes 7Li
Electron configuration [Kr]4d15s5p3 CAS number 7440-36-0
ChemSpider ID 4510681 ChemSpider is a free chemical structure database.

What is Antimony?

  • Antimony is a semi-metallic chemical element with an atomic number 51 and symbol Sb in the Periodic Table.
  • Latin name of Antimony is Stibium. It is generally found in two forms namely metallic form and non-metallic form.
  • Antimony compounds are used since ancient times as a component in cosmetics.
  • It is naturally found in Earth’s crust in the ores of valentinite and stibnite.

Uses of Antimony

  • Pure antimony is used in the manufacturing of certain semiconductors like infrared detectors and diodes.
  • It is used to harden lead and increase its durability.
  • Batteries consist of antimony for smooth functioning.
  • It is also used to make small arms & bullets.
  • It is a very good flame retardant.

Properties of Antimony

  • The metallic form appears in a bright silver colour brittle and non-metallic form will appear as the grey powder.
  • It is a weak conductor of electricity and heat. The special feature of antimony and its alloys is that they expand on cooling.

Certain Health Facts About Antimony

  • It is toxic but does not have any harmful effects. But constant exposure to this may cause some diseases like lung diseases, heart problems and stomach ulcers.

Practise This Question

The resistance a solution A is 50 ohm and that of solution B is 100 ohm, both solutions are taken in the same conductivity cell. If equal volumes of solution A and B are mixed, what is the resistance of the mixture using the same cell? (Assume there is no change or increase in the α of A and B on mixing)