( ( A cation ) ( ( ( has ( net ( positive charge ) ) ) ( -LRB- ( ( ( ( the charge ) ( of protons ) ) ( is ( greater ( than ( ( the charge ) ( of electrons ) ) ) ) ) ) -RRB- ) ) ) . ) )
(ROOT (S (NP (DT A) (NN cation)) (VP (VBZ has) (NP (JJ net) (JJ positive) (NN charge)) (PRN (-LRB- -LRB-) (S (NP (NP (DT the) (NN charge)) (PP (IN of) (NP (NNS protons)))) (VP (VBZ is) (ADJP (ADJP (JJR greater)) (PP (IN than) (NP (NP (DT the) (NN charge)) (PP (IN of) (NP (NNS electrons)))))))) (-RRB- -RRB-))) (. .)))
A cation has net positive charge (the charge of protons is greater     than the charge of electrons).
(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))))) (. .)))