( ( ( ( ( The number ) ( of ( positive charges ) ) ) ( ( ( ( ( on ( ( the nucleus ) ( of ( an atom ) ) ) ) , ) and ) ( in ( a ( neutral atom ) ) ) ) ( the number ) ) ) ( of ( orbital electrons ) ) ) . )
(ROOT (NP (NP (DT The) (NN number)) (PP (IN of) (NP (JJ positive) (NNS charges))) (PP (PP (IN on) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom))))) (, ,) (CC and) (PP (IN in) (NP (DT a) (JJ neutral) (NN atom))) (NP (DT the) (NN number))) (PP (IN of) (NP (JJ orbital) (NNS electrons))) (. .)))
The number of positive charges on the nucleus of an atom, and in a neutral atom  the number of orbital electrons.
(ROOT (S (NP (NNS Atoms)) (VP (VBP carry) (NP (DT a) (JJ neutral) (NN charge))) (. .)))