( Iron ( ( ( ( is ( the ( ( most stable ) nucleus ) ) ) , ) ( with ( ( ( 26 protons ) and ) ( 30 neutrons ) ) ) ) . ) )
(ROOT (S (NP (NNP Iron)) (VP (VBZ is) (NP (DT the) (ADJP (RBS most) (JJ stable)) (NN nucleus)) (, ,) (PP (IN with) (NP (NP (CD 26) (NNS protons)) (CC and) (NP (CD 30) (NNS neutrons))))) (. .)))
Iron is the most stable nucleus, with 26 protons and 30 neutrons.
(ROOT (S (NP (NP (NNP Nuclei)) (PP (IN with) (NP (NP (RB even) (NNS numbers)) (PP (IN of) (NP (NP (NNS protons)) (, ,) (NP (NNS neutrons)) (, ,) (CC or) (NP (DT both))))))) (VP (VBP are) (ADJP (RBR more) (JJ likely) (S (VP (TO to) (VP (VB be) (ADJP (JJ stable))))))) (. .)))