( However ( , ( ( if ( ( one ( of ( the neutrons ) ) ) ( ( ( changed ( to ( ( a proton ) ( it ( would ( become ( Carbon 12 ) ) ) ) ) ) ) , ) ( with ( 6 ( of ( each nucleon ) ) ) ) ) ) ) ( , ( this ( ( is ( more stable ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (SBAR (IN if) (S (NP (NP (CD one)) (PP (IN of) (NP (DT the) (NNS neutrons)))) (VP (VBD changed) (PP (TO to) (NP (NP (DT a) (NN proton)) (SBAR (S (NP (PRP it)) (VP (MD would) (VP (VB become) (NP (NNP Carbon) (CD 12)))))))) (, ,) (PP (IN with) (NP (NP (CD 6)) (PP (IN of) (NP (DT each) (NN nucleon)))))))) (, ,) (NP (DT this)) (VP (VBZ is) (ADJP (RBR more) (JJ stable))) (. .)))
However, if one of the neutrons changed to a proton it would become Carbon 12, with 6 of each nucleon, this is more stable.
(ROOT (S (NP (NP (DT A) (NN carbon) (NN atom)) (PP (IN with) (NP (NP (CD 6) (NNS protons)) (CC and) (NP (CD 8) (NNS neutrons))))) (VP (VBZ is) (ADVP (RBR more) (RB specifically)) (VP (VBN known) (PP (IN as) (NP (NN carbon) (CD 14))))) (. .)))
A carbon atom with 6 protons and 8 neutrons is more specifically known as carbon 14.