( ( Ionic compounds ) ( already ( ( are ( made ( of ( ( ( ( positively charged ) cations ) and ) ( ( negatively charged ) anions ) ) ) ) ) . ) ) )
(ROOT (S (NP (JJ Ionic) (NNS compounds)) (ADVP (RB already)) (VP (VBP are) (VP (VBN made) (PP (IN of) (NP (NP (ADJP (ADVP (RB positively)) (VBN charged)) (NNS cations)) (CC and) (NP (ADJP (ADVP (RB negatively)) (VBN charged)) (NNS anions)))))) (. .)))
Ionic compounds already are made of positively charged cations and negatively charged anions.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (VP (VBG naming) (NP (DT an) (JJ ionic) (NN compound))))) (, ,) (NP (DT the) (NN cation)) (VP (VBZ is) (VP (VBN written) (ADVP (RB first)))) (. .)))
When naming an ionic compound, the cation is written first.