( ( Ionic bonds ) ( typically ( ( form ( between ( metal ( and ( nonmetal compounds ) ) ) ) ) . ) ) )
(ROOT (S (NP (JJ Ionic) (NNS bonds)) (ADVP (RB typically)) (VP (VBP form) (PP (IN between) (NP (NN metal) (CC and) (NN nonmetal) (NNS compounds)))) (. .)))
Ionic bonds typically form between metal and nonmetal 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)))) (. .)))