( ( ( ( What ( ( the ( octet rule ) ) is ) ) and ) ( how ( it ( can ( be ( used ( to ( ( account ( for ( the ( way ( metals ( and ( nonmetals interact ) ) ) ) ) ) ) ( in ( forming compounds ) ) ) ) ) ) ) ) ) ) . )
(ROOT (FRAG (SBAR (SBAR (WHNP (WP What)) (S (NP (DT the) (NN octet) (NN rule)) (VP (VBZ is)))) (CC and) (SBAR (WHADVP (WRB how)) (S (NP (PRP it)) (VP (MD can) (VP (VB be) (VP (VBN used) (S (VP (TO to) (VP (VB account) (PP (IN for) (NP (DT the) (NN way) (NNS metals) (CC and) (NNS nonmetals) (NN interact))) (PP (IN in) (S (VP (VBG forming) (NP (NNS compounds)))))))))))))) (. .)))
What the octet rule is and how it can be used to account for the way metals and nonmetals interact in forming compounds.
(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))))))))))))) (. .)))