( ( Simple ions ) ( ( ( are ( charged ( atoms ( ( ( ( an atom ) ( that ( has gained ) ) ) or ) ( lost electrons ) ) ) ) ) . ) -RRB- ) )
(ROOT (S (NP (NN Simple) (NNS ions)) (VP (VBP are) (VP (VBN charged) (S (NP (NNS atoms)) (NP (NP (NP (DT an) (NN atom)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (VP (VBN gained)))))) (CC or) (NP (VBN lost) (NNS electrons)))))) (. .) (-RRB- -RRB-)))
Simple ions are charged atoms an atom that has gained or lost electrons.)
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT an) (NN atom)) (VP (VBZ gains) (CC or) (VBZ loses) (NP (DT an) (NN electron))))) (NP (PRP it)) (VP (VBZ becames) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN ion))) (. .)))