( ( ( The number ) ( of ( electrons ( in ( a ( neutral atom ) ) ) ) ) ) ( ( is ( equal ( to ( ( the number ) ( of protons ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN number)) (PP (IN of) (NP (NP (NNS electrons)) (PP (IN in) (NP (DT a) (JJ neutral) (NN atom)))))) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS protons))))))) (. .)))
The number of electrons in a neutral atom is equal to the number of protons.
(ROOT (S (SBAR (IN Because) (S (NP (NNS atoms)) (VP (VBP have) (NP (NP (JJ equal) (NNS numbers)) (PP (IN of) (NP (NP (JJ positive) (NNS protons)) (CC and) (NP (JJ negative) (NNS electrons)))))))) (, ,) (NP (PRP they)) (VP (VBP possess) (NP (DT a) (JJ neutral) (NN charge))) (. .)))