( ( Ordinary metals ) ( ( ( are ( good conductors ) ) ( because ( ( their ( valence electrons ) ) ( can ( ( ( move freely ) ( from atom ) ) ( to ( atom ( in ( the ( long-range ( periodic structure ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Ordinary) (NNS metals)) (VP (VBP are) (NP (JJ good) (NNS conductors)) (SBAR (IN because) (S (NP (PRP$ their) (JJ valence) (NNS electrons)) (VP (MD can) (VP (VB move) (ADVP (RB freely)) (PP (IN from) (NP (NN atom))) (PP (TO to) (NP (NP (NN atom)) (PP (IN in) (NP (DT the) (JJ long-range) (JJ periodic) (NN structure)))))))))) (. .)))
Ordinary metals are good conductors because their valence electrons can move freely from atom to atom in the long-range periodic structure.
(ROOT (S (NP (NP (NNS Atoms)) (PP (IN of) (NP (NNS metals)))) (VP (VBP are) (NP (NP (JJ good) (NNS conductors)) (PP (IN of) (NP (NN electricity)))) (SBAR (IN because) (S (NP (PRP they)) (VP (VB give) (PRT (RP up)) (NP (NNS electrons)))))) (. .)))