( ( ( Cation ( An atom ) ) ( that ( loses ( ( an electron ) ( becomes ( a ( ( positively charged ) ion ) ) ) ) ) ) ) ( ( called ( a cation ) ) . ) )
(ROOT (S (NP (NP (JJ Cation) (DT An) (NN atom)) (SBAR (WHNP (WDT that)) (S (VP (VBZ loses) (SBAR (S (NP (DT an) (NN electron)) (VP (VBZ becomes) (NP (DT a) (ADJP (ADVP (RB positively)) (VBN charged)) (NN ion))))))))) (VP (VBD called) (NP (DT a) (NN cation))) (. .)))
Cation An atom that loses an electron becomes a positively charged ion called a cation.
(ROOT (S (NP (NP (NNS Ions)) (SBAR (WHNP (WDT that)) (S (VP (VBP contain) (NP (JJR fewer) (NNS electrons)) (PP (IN than) (NP (NNS protons))))))) (VP (VP (VBP have) (NP (DT a) (JJ net) (JJ positive) (NN charge))) (CC and) (VP (VBP are) (VP (VBN called) (NP (NNS cations))))) (. .)))