( ( Define ( atom ( , ( ion ( , ( element ( , ( ( compound and ) molecule ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Define) (NP (NN atom) (, ,) (NN ion) (, ,) (NN element) (, ,) (NN compound) (CC and) (NN molecule))) (. .)))
Define atom, ion, element, compound and molecule.
(ROOT (S (NP (NP (JJ Ionic) (NN compound) (NNS atoms)) (PP (IN of) (NP (JJ various) (NNS elements)))) (VP (VBP gain) (CC or) (VBP lose) (NP (NNS electrons) (S (VP (TO to) (VP (VB produce) (NP (NNS ions))))))) (. .)))