Compare the crystals of copper and diamond giving one similarity and one difference.

Name the crystal structure of copper metal.

Compare the structure of diamond and graphite ?

Write one similarity between Be and Al.

Write one similarity between Be and Al.

Compare the structure of the crystal of diamond graphite with special reference to the reason for diamond being the hardest natural substance while graphite one of the softest. Compare the electrical & thermal conductivity of the two crystalline allotropes of carbon.

Give examples of: One negative and one positive integer whose difference is -9.

State one appropriate observation for -When crystals of copper nitrate are heated in a test tube .

Give three properties of diamond.

Give example of: One negative and one positive integer whose difference isw -15.

For a crystal of diamond, state : The hybridization of the carbon atom.