( There ( ( are ( methods ( to ( ( determine ( ( the number ) ( of protons ) ) ) ( on ( each ( of ( the carbons ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NNS methods) (S (VP (TO to) (VP (VB determine) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS protons)))) (PP (IN on) (NP (NP (DT each)) (PP (IN of) (NP (DT the) (NNS carbons)))))))))) (. .)))
There are methods to determine the number of protons on each of the carbons.
(ROOT (S (NP (NP (DT The) (NN chemistry)) (PP (IN of) (NP (DT each) (NN element)))) (VP (VBZ is) (VP (VBN determined) (PP (IN by) (NP (NP (PRP$ its) (NN number)) (PP (IN of) (NP (NNS protons) (CC and) (NNS electrons))))))) (. .)))