( ( For nitrogen ) ( that ( ( would ( be ( ( 2s ( 2 ( 2p 3 ) ) ) ( for ( ( a total ) ( of ( 5 ( valence electrons ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN For) (NP (NN nitrogen))) (NP (DT that)) (VP (MD would) (VP (VB be) (VP (VBN 2s) (NP (CD 2) (JJ 2p) (CD 3)) (PP (IN for) (NP (NP (DT a) (NN total)) (PP (IN of) (NP (CD 5) (JJ valence) (NNS electrons)))))))) (. .)))
For nitrogen that would be 2s 2 2p 3 for a total of 5 valence electrons.
(ROOT (S (NP (NNP Nitrogen)) (VP (VBZ has) (NP (CD 5) (JJ valence) (NNS electrons))) (. .)))