( ( ( Isotopes - ) ( Atoms ( with ( ( differing number ) ( of neutrons ) ) ) ) ) ( ( will ( affect ( ( the ( mass number ) ) ( -LRB- ( ( ( protons and ) neutrons ) -RRB- ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Isotopes)) (: -) (NP (NP (NNP Atoms)) (PP (IN with) (NP (NP (VBG differing) (NN number)) (PP (IN of) (NP (NNS neutrons))))))) (VP (MD will) (VP (VB affect) (NP (NP (DT the) (JJ mass) (NN number)) (PRN (-LRB- -LRB-) (NP (NP (NNS protons)) (CC and) (NP (NNS neutrons))) (-RRB- -RRB-))))) (. .)))
Isotopes- Atoms with differing number of neutrons will affect the mass number (protons and neutrons).
(ROOT (S (S (S (VP (VBG Adding) (NP (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS protons)))) (CC plus) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS neutrons)) (PP (IN in) (NP (DT an) (NN atom))))))))) (VP (VBZ decides) (NP (PRP$ its) (JJ approximate) (NN mass)))) (: ;) (S (NP (JJ atomic) (NN number)) (VP (VBZ is) (NP (NP (DT another) (NN word)) (PP (IN for) (NP (DT this) (NN value)))))) (. .)))