What is difference between N and N2
What is valency of N2 of N2 and why.

Dear student

N represents the atom nitrogen and N2 represents the gas dinitrogen which is a diatomic molecule made by formation of triple bond between 2 nitrogen atoms.
The electrons in outermost shell of nitrogen is 5 hence by formation of 3 covalent bonds , three more electrons are shared thus completing the octet of these atoms.
Hence valency of nitrogen in N2 is 3.


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