( Cations ( ( are ( atoms ( with ( ( excess ( positive charge ) ) ( -LRB- ( ( ( fewer electrons ) ( than protons ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Cations)) (VP (VBP are) (NP (NP (NNS atoms)) (PP (IN with) (NP (NP (JJ excess) (JJ positive) (NN charge)) (PRN (-LRB- -LRB-) (NP (NP (JJR fewer) (NNS electrons)) (PP (IN than) (NP (NNS protons)))) (-RRB- -RRB-)))))) (. .)))
Cations are atoms with excess positive charge ( fewer electrons than protons).
(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))))) (. .)))