( ( ( ( ( Carbon 14 ) , ) ( the ( radioactive isotope ) ) ) , ) ( ( has ( ( ( 6 protons ) and ) ( 8 neutrons ) ) ) . ) )
(ROOT (S (NP (NP (NNP Carbon) (CD 14)) (, ,) (NP (DT the) (JJ radioactive) (NN isotope)) (, ,)) (VP (VBZ has) (NP (NP (CD 6) (NNS protons)) (CC and) (NP (CD 8) (NNS neutrons)))) (. .)))
Carbon 14, the radioactive isotope, has 6 protons and 8 neutrons.
(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.