( ( The ( nitrogen atom ) ) ( ( ( ( has ( ( only 5 ) ( valence electrons ) ) ) and ) ( ( is therefore ) ( considered ( an electrophile ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN nitrogen) (NN atom)) (VP (VP (VBZ has) (NP (QP (RB only) (CD 5)) (JJ valence) (NNS electrons))) (CC and) (VP (VBZ is) (ADVP (RB therefore)) (VP (VBN considered) (NP (DT an) (NN electrophile))))) (. .)))
The nitrogen atom has only 5 valence electrons and is therefore considered an electrophile.
(ROOT (S (NP (NNP Nitrogen)) (VP (VBZ has) (NP (CD 5) (JJ valence) (NNS electrons))) (. .)))