( ( ( Write down ) ( ( a ( mathematical formula ) ) ( that ( ( ( describes ( what ( ( ( the ( ionic ( compound 's ) ) ) ( net charge ) ) ( is ( equal to ) ) ) ) ) , ) ( ( using ( ( ( numbers and ) charges ) ( of ( ( cations and ) anions ) ) ) ) ( as ( your variables ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Write) (PRT (RP down)) (NP (NP (DT a) (JJ mathematical) (NN formula)) (SBAR (WHNP (WDT that)) (S (VP (VBZ describes) (SBAR (WHNP (WP what)) (S (NP (NP (DT the) (JJ ionic) (NN compound) (POS 's)) (JJ net) (NN charge)) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to)))))) (, ,) (S (VP (VBG using) (NP (NP (NNS numbers) (CC and) (NNS charges)) (PP (IN of) (NP (NNS cations) (CC and) (NNS anions)))) (PP (IN as) (NP (PRP$ your) (NNS variables)))))))))) (. .)))
Write down a mathematical formula that describes what the ionic compound's net charge is equal to, using numbers and charges of cations and anions as your variables.
(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.