Antimony (Sb) :

Define : Antimony is metalloid which is place in between Arsenic and Bismuth . It show lustrous , shiny, hard , and brittle properties. It Is place in nitrogen family .it is toxic in nature.

Discovery :  Antimony is present on earth from Ancient times.

Origin of name :.The name is originated from Greek word ‘ Anti – monos‘

Meaning of this word is Not alone .

Physical properties :

Atomic symbol: Antimony is denoted by symbol Sb

Atomic number : Atomic number of Antimony is 51

In Antimony 51 proton and 51 neutron is present

Atomic weight/ mass: atomic weight of Antimony is 121.7 Amu

In Antimony 51 proton and 71 neutrons is present in antimony

Position : it is place in periodic table at 5th row (period) and 15th column ( group)

Block : it is place in p block

Colour : antimony show grey colour

Nature : Antimony present in nature at solid form .

Boiling point : boiling point of Antimony is 15870C

Melting point : melting point of Antimony is 630 0C


Antimony show 2 stable isotopes

121Sb: Atomic weight of this isotope is 120.9 Amu

In this isotope 51 proton,51 electron and 70 neutron is present

It is present 57.21% in nature

123Sb: Atomic weight of this isotope is 122.9 Amu

In this isotope 51 proton, 51 electron and 72 neutron is present

It is present 42.7% in nature .

Chemical properties :

Electronic configuration

Electronic configuration of Antimony is [ Kr ] 4d10 5S2 5P3

Electronic configuration in concert of shell is 2,8,18,18,5

Electronic structure

Valency: valency of Antimony is 3

In valence shell 3 valence electrons is present

Atomic radius : Atomic radius of Antimony is 133 Pm

Reactivity : Antimony is less reactive element

At normal temperature It does not react with Air and water .

At high temperature it is burn in air


It’s trioxide form is use to make flame retardant material

Antimony is use to make paints and pigments

It is also use to make glass and enamels

Antimony is use as doping material in semiconductor and use in electrical device

It’s alloy form is use in cosmetics products .like eyeliner , mascara.

Antimony is use in solar panel .

It is use to make cable sheets , pipes and pumps

It is mainly use to make sofas , furniture ,auto and aircraft seat covers


Question and Answer:

Q1. Define Antimony

Q2. Who discovered Antimony?

Q2. Physical properties of Antimony

Q4. Write Atomic Symbol of Antimony.

Q5. Write the Atomic number of Antimony.

Q6. On which block Antimony element is present?

Q7. What is the color of Antimony?

Q8. What is the Boiling point of Antimony?

Q9. What is the Melting point of Antimony?

Q10. Write the Isotopes of Antimony.

Q11. Show Electronic configuration of Antimony.

Q12. Write Electronic Structure of Antimony.

Q13. What is the Valency of Antimony?

Q14. Write the uses of Antimony element.

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