Question

(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.

Answer 1

Allotropes

• Allotropes are two or more forms of the same elements that exist in the same physical state (solid, liquid, or gas) but have physical and chemical properties that differ from one another.

Allotropes of carbon

• Carbon exhibits many allotropic forms. Diamond and graphite are two well-known crystalline forms of carbon.
• In a hexagonal ring, the hybridization of each carbon atom is ${\mathrm{sp}}^2$.
• A pi bond is formed by the fourth electron. The electrons are delocalized over the whole sheet.
• So, graphite conducts electricity along with the sheet.

So, graphite is an allotrope of carbon and a good conductor of electricity.