( ( If ( ( ( the sum ) ( of ( ( ( ( the ( oxidation numbers ) ) ( of ( the elements ) ) ) and ) ( ( the charges ) ( on ( ( polyatornic ions ) ( in ( that compound ) ) ) ) ) ) ) ) ( equal 0 ) ) ) ( , ( then ( it ( ( is ( a ( neutral compound ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (DT the) (NN sum)) (PP (IN of) (NP (NP (NP (DT the) (NN oxidation) (NNS numbers)) (PP (IN of) (NP (DT the) (NNS elements)))) (CC and) (NP (NP (DT the) (NNS charges)) (PP (IN on) (NP (NP (JJ polyatornic) (NNS ions)) (PP (IN in) (NP (DT that) (NN compound))))))))) (VP (VBP equal) (NP (CD 0))))) (, ,) (ADVP (RB then)) (NP (PRP it)) (VP (VBZ is) (NP (DT a) (JJ neutral) (NN compound))) (. .)))
If the sum of the oxidation numbers of the elements and the charges on polyatornic ions in that compound equal 0, then it is a neutral compound.
(ROOT (S (NP (JJ Iconic) (NNS compounds)) (VP (VBP have) (NP (DT a) (JJ net) (JJ neutral) (NN charge))) (. .)))