( ( ( One ( major classification ) ) ( of ( the elements ) ) ) ( ( is ( as ( metals ( , ( nonmetals ( , ( and metalloids ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD One) (JJ major) (NN classification)) (PP (IN of) (NP (DT the) (NNS elements)))) (VP (VBZ is) (PP (IN as) (NP (NNS metals) (, ,) (NNS nonmetals) (, ,) (CC and) (NNS metalloids)))) (. .)))
One major classification of the elements is as metals , nonmetals , and metalloids.
(ROOT (S (NP (NP (JJ Ionic) (NNS bonds)) (PP (IN between) (NP (CD two) (NNS atoms)))) (VP (VBP require) (NP (NP (CD one) (NN metal)) (CC and) (NP (CD one) (NN nonmetal)))) (. .)))