( However ( , ( I ( ( think ( that ( ( when ( ( elements ( such ( as ( ( nitrogen or ) carbon ) ) ) ) ( are present ) ) ) ( , ( ( the oxygen ) ( will ( bond ( to ( those ( instead ( because ( of ( the ( different electronegativities ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (NP (PRP I)) (VP (VBP think) (SBAR (IN that) (S (SBAR (WHADVP (WRB when)) (S (NP (NP (NNS elements)) (PP (JJ such) (IN as) (NP (NN nitrogen) (CC or) (NN carbon)))) (VP (VBP are) (ADJP (JJ present))))) (, ,) (NP (DT the) (NN oxygen)) (VP (MD will) (VP (NP (NN bond)) (PP (TO to) (NP (NP (DT those)) (PP (RB instead) (RB because) (IN of) (NP (DT the) (JJ different) (NNS electronegativities)))))))))) (. .)))
However, I think that when elements such as nitrogen or carbon are present, the oxygen will bond to those instead because of the different electronegativities.
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (DT the) (JJ second) (ADJP (RBS most) (JJ electronegative)) (NN element))))) (. .)))