( ( ( ( ( Carbon ( -LRB- ( ( group 4A ) -RRB- ) ) ) ( has ( four ( valence electrons ) ) ) ) and ) ( ( hydrogen ( -LRB- ( ( group 1A ) -RRB- ) ) ) ( has ( one ( valence electron ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NNP Carbon)) (PRN (-LRB- -LRB-) (NP (NN group) (CD 4A)) (-RRB- -RRB-))) (VP (VBZ has) (NP (CD four) (JJ valence) (NNS electrons)))) (CC and) (S (NP (NP (NN hydrogen)) (PRN (-LRB- -LRB-) (NP (NN group) (CD 1A)) (-RRB- -RRB-))) (VP (VBZ has) (NP (CD one) (NN valence) (NN electron)))) (. .)))
Carbon (group 4A) has four valence electrons and hydrogen (group 1A) has one valence electron.
(ROOT (S (NP (CD Four) (JJ valence) (NNS electrons)) (VP (MD can) (VP (VB be) (VP (VBN found) (PP (IN in) (NP (DT a) (NN carbon) (NN atom)))))) (. .)))