( ( Salt ( An ( ionic compound ) ) ) ( ( ( made up ) ( of ( ( ( a cation ) and ) ( an anion ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Salt)) (NP (DT An) (JJ ionic) (NN compound))) (VP (VBD made) (PRT (RP up)) (PP (IN of) (NP (NP (DT a) (NN cation)) (CC and) (NP (DT an) (NN anion))))) (. .)))
Salt An ionic compound made up of a cation and an anion.
(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.