( ( ( This transfer ) ( of electrons ) ) ( ( occurs ( because ( nonmetals ( ( have ( ( a ( ( much greater ) attraction ) ) ( for electrons ) ) ) ( than ( metals do ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN transfer)) (PP (IN of) (NP (NNS electrons)))) (VP (VBZ occurs) (SBAR (IN because) (S (NP (NNS nonmetals)) (VP (VBP have) (NP (NP (DT a) (ADJP (RB much) (JJR greater)) (NN attraction)) (PP (IN for) (NP (NNS electrons)))) (SBAR (IN than) (S (NP (NNS metals)) (VP (VBP do)))))))) (. .)))
This transfer of electrons occurs because nonmetals have a much greater attraction for electrons than metals do.
(ROOT (S (NP (NNS Nonmetals)) (VP (VBP have) (NP (NP (DT the) (JJS highest) (NN attraction)) (PP (IN for) (NP (NNS electrons))))) (. .)))