( ( ( ( ( ( Negatively charged ) atoms ) , ) ( called anions ) ) , ) ( ( result ( when ( nonmetals ( gain electrons ) ) ) ) . ) )
(ROOT (S (NP (NP (ADJP (RB Negatively) (VBN charged)) (NNS atoms)) (, ,) (VP (VBN called) (NP (NNS anions))) (, ,)) (VP (VBP result) (SBAR (WHADVP (WRB when)) (S (VP (VBZ nonmetals) (NP (NN gain) (NNS electrons)))))) (. .)))
Negatively charged atoms, called anions, result when nonmetals gain electrons.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN anion)) (VP (VBZ is) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (DT an) (NN element)) (VP (VBZ gains) (NP (QP (CD one) (CC or) (JJR more)) (NNS electrons))))))) (. .)))