( ( If ( ( the atom ) ( is neutral ) ) ) ( , ( ( meaning ( it ( has ( no charge ) ) ) ) ( , ( ( ( the number ) ( of negatively ) ) ( ( charged ( electrons ( is ( equal ( to ( ( the number ) ( of ( ( positively charged ) protons ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT the) (NN atom)) (VP (VBZ is) (ADJP (JJ neutral))))) (, ,) (S (VP (VBG meaning) (SBAR (S (NP (PRP it)) (VP (VBZ has) (NP (DT no) (NN charge))))))) (, ,) (NP (NP (DT the) (NN number)) (PP (IN of) (ADVP (RB negatively)))) (VP (VBD charged) (SBAR (S (NP (NNS electrons)) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (ADJP (ADVP (RB positively)) (VBN charged)) (NNS protons)))))))))) (. .)))
If the atom is neutral, meaning it has no charge, the number of negatively charged electrons is equal to the number of positively charged 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))) (. .)))