( ( ( ( ( ( This behavior ) ( is ( similar ( to ( that ( of ( the ( main-group elements ) ) ) ) ) ) ) ) , ) but ) ( ( is ( in ( ( stark contrast ) ( to ( that ( of ( the ( neighboring group ) ) ) ) ) ) ) ) ( ( ( ( 11 elements ) ( -LRB- ( ( ( ( ( ( copper , ) silver ) , ) and ) gold ) -RRB- ) ) ) , ) ( which ( also ( ( ( have ( filled ( d-subshells ( in ( their ( ground-state ( electron configuration ) ) ) ) ) ) ) but ) ( ( behave chemically ) ( as ( transition metals ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT This) (NN behavior)) (VP (VBZ is) (ADJP (JJ similar) (PP (TO to) (NP (NP (DT that)) (PP (IN of) (NP (DT the) (JJ main-group) (NNS elements)))))))) (, ,) (CC but) (SINV (VP (VBZ is) (PP (IN in) (NP (NP (JJ stark) (NN contrast)) (PP (TO to) (NP (NP (DT that)) (PP (IN of) (NP (DT the) (JJ neighboring) (NN group)))))))) (NP (NP (CD 11) (NNS elements)) (PRN (-LRB- -LRB-) (NP (NP (NN copper)) (, ,) (NP (NN silver)) (, ,) (CC and) (NP (NN gold))) (-RRB- -RRB-)) (, ,) (SBAR (WHNP (WDT which)) (S (ADVP (RB also)) (VP (VP (VBP have) (VP (VBN filled) (NP (NP (NNS d-subshells)) (PP (IN in) (NP (PRP$ their) (JJ ground-state) (NN electron) (NN configuration)))))) (CC but) (VP (VB behave) (ADVP (RB chemically)) (PP (IN as) (NP (NN transition) (NNS metals))))))))) (. .)))
This behavior is similar to that of the main-group elements, but is in stark contrast to that of the neighboring group 11 elements (copper, silver, and gold), which also have filled d-subshells in their ground-state electron configuration but behave chemically as transition metals.
(ROOT (S (NP (NP (DT The) (JJ chemical) (NN behavior)) (PP (IN of) (NP (NNS elements)))) (VP (MD can) (ADVP (RB largely)) (VP (VB be) (VP (VBN explained) (PP (IN by) (NP (NN electron) (NNS configurations)))))) (. .)))