Five valence electrons for one nitrogen and 10 valence electrons for two nitrogens
If it is shown as ∆H , then it means that a specific chemical reaction is undergoing heat in Kelvin(K). If it is shown as ∆H° , then it means that a specific chemical reaction is undergoing heat in Celsius(C⁰).
Hope this is the answer you are looking for mate!
If it is correct then please mark my answer as the brailiest! :)
The correct answer is d)all of above
examples for a are tyrosine for b lysine and for c isoleucine