( ( ( ( ( ( To ( compute ( ( the ( oxidation number ) ) ( of ( an atom ) ) ) ) ) ( , ( ( ( ion or ) molecule ) ( is straightforward ) ) ) ) , ) but ) ( there ( are ( a ( few ( rules ( to remember ) ) ) ) ) ) ) . )
(ROOT (S (S (S (VP (TO To) (VP (VB compute) (NP (NP (DT the) (NN oxidation) (NN number)) (PP (IN of) (NP (DT an) (NN atom))))))) (, ,) (NP (NN ion) (CC or) (NN molecule)) (VP (VBZ is) (ADJP (JJ straightforward)))) (, ,) (CC but) (S (NP (EX there)) (VP (VBP are) (NP (DT a) (JJ few) (NNS rules) (S (VP (TO to) (VP (VB remember))))))) (. .)))
To compute the oxidation number of an atom, ion or molecule is straightforward, but there are a few rules to remember.
(ROOT (S (NP (DT The) (NN octet) (NN rule)) (VP (VP (VBZ is) (NP (NP (DT a) (NN result)) (PP (IN of) (NP (NP (NNS trends)) (PP (IN in) (NP (NNS energies))))))) (CC and) (VP (VBZ is) (ADJP (JJ useful) (PP (IN in) (S (VP (VBG explaining) (SBAR (WHADVP (WRB why)) (S (NP (NNS atoms)) (VP (VBP form) (NP (DT the) (NNS ions)) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP do))))))))))))) (. .)))