Which substance is used to cut glasses?

Allotrope of carbon used to make black paint.

Carbon forms _________ compounds.

Melting point of diamond is

Group number of carbon is

Graphite is a good _________ of electricity.

Choose the allotrope of carbon.

Steel is an alloy based on iron and

Covalent bonds are formed by ___________ valence electrons.

Choose the allotrope of carbon.