( ( ( The ( real reason ) ) ( that ( ( almost ( all ( the elements ) ) ) ( are metallic ) ) ) ) ( ( is ( because ( ( ( the nucleus ) ( of elements ) ) ( has ( ( a ( metallic ( bonding property ) ) ) ( of ( sharing ( nuclear electrons ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ real) (NN reason)) (SBAR (IN that) (S (NP (RB almost) (PDT all) (DT the) (NNS elements)) (VP (VBP are) (ADJP (JJ metallic)))))) (VP (VBZ is) (SBAR (IN because) (S (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (NNS elements)))) (VP (VBZ has) (NP (NP (DT a) (JJ metallic) (NN bonding) (NN property)) (PP (IN of) (S (VP (VBG sharing) (NP (JJ nuclear) (NNS electrons)))))))))) (. .)))
The real reason that almost all the elements are metallic is because the nucleus of elements has a metallic bonding property of sharing nuclear electrons.
(ROOT (S (NP (DT The) (JJ metallic) (NN bond)) (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (NP (NP (DT the) (NNS properties)) (PP (IN of) (NP (NNS metals))))))) (. .)))