chemistry

I have to draw Lewis structures for hydrogen cyanide and cyanogen with nitrogen valency of three. Would I still need 2 dots after the N in hydrogen cyanide or would this represent nitrogen with a valency of 5?

Yes. THose two "dots" are unshared electrons.

Thanks. When writing the structural formula for HCN I have done as follows H-C=N with triple lines not double between C and N. Is that correct for a structural formula with nitrogen valency of three?

yes.

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