An element belonging to group 14 of the periodic table has two common allotrpoes A and B. A is very hard and a non conductor of electricity while B is soft to touch and good conductor of electricity . Identify the element . Name each of these allotropes.

Explanation

The element of group 14 which has two allotropes having the given properties is carbon. These allotropes are graphite and diamond. Graphite is soft and is a good conductor of electricity while diamond is hard and is a nonconductor of electricity.