( ( ( ( Ions - ) ( ( An electrically ) ( charged particle ) ) ) , ) ( ( formed ( when ( ( an atom ) ( ( loses or ) ( ( gains ( ( ( one or ) more ) electrons ) ) ( to ( form ( a ( stable ( outer shell ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Ions)) (: -) (NP (NP (DT An) (NN electrically)) (VP (VBN charged) (NP (NN particle)))) (, ,)) (VP (VBD formed) (SBAR (WHADVP (WRB when)) (S (NP (DT an) (NN atom)) (VP (VP (VBZ loses)) (CC or) (VP (VBZ gains) (NP (QP (CD one) (CC or) (JJR more)) (NNS electrons)) (S (VP (TO to) (VP (VB form) (NP (DT a) (JJ stable) (JJ outer) (NN shell)))))))))) (. .)))
Ions- An electrically charged particle, formed when an atom loses or gains one or more electrons to form a stable outer shell.
(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))) (. .)))