Question

Why diamond is hard and graphite is soft according to 0th science easy language please?

Answer 1

this is bcoz diamond has a rigid 3D structure and all the carbon atoms are attached to each other.

However in graphite it's not a 3D structure but different layers are joined together weak bonds knows as wanderwald's bond.

Answer 2

This is because diamond's atoms are connected by covalent bonds, but graphite layers are attracted by weak vanderwals forces.(see the structure u will only understand then)

vanderwals forces are electrostatic forces between atoms.(electrostatic forces are those forces between two like or unlike charges)

always remember

ionic bond>covalent bonds>vanderwal forces

according to strength