( ( Metallic bonding ) ( ( is ( ( ( an extension ) ( of ( covalent bonding ) ) ) ( where ( ( ( ( all ( the valence ) ) or ) ( outermost electrons ) ) ( are ( shared ( by ( ( all ( the ( constituent atoms ) ) ) ( of ( a material ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Metallic) (NNP bonding)) (VP (VBZ is) (NP (NP (DT an) (NN extension)) (PP (IN of) (NP (JJ covalent) (NN bonding))) (SBAR (WHADVP (WRB where)) (S (NP (NP (PDT all) (DT the) (NN valence)) (CC or) (NP (JJ outermost) (NNS electrons))) (VP (VBP are) (VP (VBN shared) (PP (IN by) (NP (NP (PDT all) (DT the) (JJ constituent) (NNS atoms)) (PP (IN of) (NP (DT a) (NN material))))))))))) (. .)))
Metallic bonding is an extension of covalent bonding where all the valence or outermost electrons are shared by all the constituent atoms of a material.
(ROOT (S (NP (NNP Valence)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (JJ covalent) (NNS bonds))))) (SBAR (S (NP (DT an) (NN atom)) (VP (MD can) (VP (VB form))))))) (. .)))
Valence is the term for the number of covalent bonds an atom can form.