chemistry

the above is wrong....Cs is a metal and with metallic bond exist between its atom, and it occur as Cs but not Cs2

two examples of molecules containing double covalent bond are
CO2 carbon dioxide O=C=O, O2 oxygen O=O. (their bond are ALL double bond)

And some bonds in them are not all double, but they contain double bond.
C2H4 ethene H-C=C-H (one double bond and two single bond),

There are so much.... you can try yourself..just try to draw them and it will make u easier to do.

Covalent bond is the attractive bond between non-metal atoms..

Common example will be CO2 (O=C=O) , O2 (O=O) , etc.

CO2,Cs2