( ( When ( ( a ( ( metal and ) nonmetal ) ) ( form ( a compound ) ) ) ) ( , ( most ( ( ( often ( the nonmetal ) ) ( ( attracts ( ( electrons ( more strongly ) ) ( than ( the metal ) ) ) ) ( -LRB- ( ( i.e. ( , ( it ( has ( a ( larger electronegativity ) ) ) ) ) ) -RRB- ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT a) (NN metal) (CC and) (NN nonmetal)) (VP (VBP form) (NP (DT a) (NN compound))))) (, ,) (NP (JJS most)) (VP (ADVP (RB often) (NP (DT the) (NN nonmetal))) (VBZ attracts) (ADJP (JJ electrons) (ADVP (RBR more) (RB strongly)) (PP (IN than) (NP (DT the) (NN metal)))) (PRN (-LRB- -LRB-) (S (NP (NNP i.e.)) (, ,) (NP (PRP it)) (VP (VBZ has) (NP (DT a) (JJR larger) (NN electronegativity)))) (-RRB- -RRB-))) (. .)))
When a metal and nonmetal form a compound, most often the nonmetal attracts electrons more strongly than the metal (i.e., it has a larger electronegativity).
(ROOT (S (NP (NNS Nonmetals)) (VP (VBP have) (NP (NP (DT the) (JJS highest) (NN attraction)) (PP (IN for) (NP (NNS electrons))))) (. .)))