( ( ( The ( positive charge ) ) ( on ( the ( metal ion ) ) ) ) ( ( ( draws ( electron density ) ) ( from ( ( the ( O-H bond ) ) ( in ( the water ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ positive) (NN charge)) (PP (IN on) (NP (DT the) (NN metal) (NN ion)))) (VP (VBZ draws) (NP (NN electron) (NN density)) (PP (IN from) (NP (NP (DT the) (JJ O-H) (NN bond)) (PP (IN in) (NP (DT the) (NN water)))))) (. .)))
The positive charge on the metal ion draws electron density from the O-H bond in the water.
(ROOT (S (NP (JJ Metallic) (NNS bonds)) (VP (VBP hold) (PRT (RP together)) (NP (NP (JJ positive) (NN metal) (NNS ions)) (CC and) (NP (PRP$ their) (JJ valence) (NNS electrons)))) (. .)))