( ( Deuterium ( atoms ( and ( ordinary ( hydrogen atoms ) ) ) ) ) ( ( have ( one electron ) ) . ) )
(ROOT (S (NP (ADVP (RB Deuterium)) (NNS atoms) (CC and) (JJ ordinary) (NN hydrogen) (NNS atoms)) (VP (VBP have) (NP (CD one) (NN electron))) (. .)))
Deuterium atoms and ordinary hydrogen atoms have one electron.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD one) (NNS electrons)) (PP (IN in) (NP (DT the) (NN hydrogen) (NN atom))))) (. .)))