( Metals ( often ( ( ( react ( with nonmetals ) ) ( to ( form ( ionic compounds ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Metals)) (ADVP (RB often)) (VP (VBP react) (PP (IN with) (NP (NNS nonmetals))) (S (VP (TO to) (VP (VB form) (NP (JJ ionic) (NNS compounds)))))) (. .)))
Metals often react with nonmetals to form ionic compounds .
(ROOT (S (NP (NP (JJ Ionic) (NNS bonds)) (PP (IN between) (NP (CD two) (NNS atoms)))) (VP (VBP require) (NP (NP (CD one) (NN metal)) (CC and) (NP (CD one) (NN nonmetal)))) (. .)))