( Conversely ( , ( ( whenever ( ( an atom ) ( acquires ( an ( extra electron ) ) ) ) ) ( , ( it ( ( ( ( becomes ( a ( negative ion ) ) ) and ) ( has ( a ( negative charge ) ) ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB Conversely)) (, ,) (SBAR (WHADVP (WRB whenever)) (S (NP (DT an) (NN atom)) (VP (VBZ acquires) (NP (DT an) (JJ extra) (NN electron))))) (, ,) (NP (PRP it)) (VP (VP (VBZ becomes) (NP (DT a) (JJ negative) (NN ion))) (CC and) (VP (VBZ has) (NP (DT a) (JJ negative) (NN charge)))) (. .)))
Conversely, whenever an atom acquires an extra electron, it becomes a negative ion and has a negative charge.
(ROOT (S (NP (NP (NNS Atoms)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (VP (VP (VBN gained) (NP (NNS electrons))) (CC and) (VP (VBN become) (S (VP (ADVP (RB negatively)) (VBN charged))))))))) (VP (VBP are) (VP (VBN called) (NP (JJ negative) (NNS ions)))) (. .)))