I have a few questions about the terminal nitrogen (highlighted in red) in diazomethane, $\ce{CH2N2}$.
Is that nitrogen $\mathrm{sp}$ or $\mathrm{sp^2}$ hybridised?
What type of orbitals do the lone pairs on that nitrogen reside in?
Does the negative charge on nitrogen undergo resonance?
https://i.sstatic.net/dFY0R.jpg