( ( ( ( ( Describe ( ( the ( electron-sea model ) ) ( of ( metallic bonding ) ) ) ) , ) and ) ( explain ( why ( metals ( are ( good ( electrical conductors ) ) ) ) ) ) ) . )
(ROOT (S (VP (VP (VB Describe) (NP (NP (DT the) (JJ electron-sea) (NN model)) (PP (IN of) (NP (JJ metallic) (NN bonding))))) (, ,) (CC and) (VP (VB explain) (SBAR (WHADVP (WRB why)) (S (NP (NNS metals)) (VP (VBP are) (NP (JJ good) (JJ electrical) (NNS conductors))))))) (. .)))
Describe the electron-sea model of metallic bonding, and explain why metals are good electrical conductors.
(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)))))) (. .)))