Name a non-metal which is very hard.

If a metal coin is dropped on hard floor, it produces a ringing sound. What is this property of metals known as?

Name the property of iron metal due to which it can be hammered to make objects of different shapes such as an axe, a spade or a shovel.

Name a non-metal which is good conductor of electricity?

State on chemical property which can be used to distinguish a metal from a non-metal.