( ( Each ( carbon atom ) ) ( ( has ( ( four ( valence electrons ) ) ( available ( to ( participate ( in ( ( the formation ) ( of ( chemical bonds ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT Each) (NN carbon) (NN atom)) (VP (VBZ has) (NP (NP (CD four) (JJ valence) (NNS electrons)) (ADJP (JJ available) (S (VP (TO to) (VP (VB participate) (PP (IN in) (NP (NP (DT the) (NN formation)) (PP (IN of) (NP (NN chemical) (NNS bonds))))))))))) (. .)))
Each carbon atom has four valence electrons available to participate in the formation of chemical bonds.
(ROOT (S (NP (NNP Carbon)) (VP (VBZ has) (NP (CD four) (JJ valence) (NNS electrons))) (. .)))