( ( Formulas ( for ( ( ionic compounds ) ( ( empirical formula ) ( gives ( ( ( the ( elemental composition ) ) ( of ( a ( compound formula ) ) ) ) ( lists ( elements ( ( present ( by ( element ( symbol subscripts ) ) ) ) ( ( give ( ratios ( of ( ( ions or ) atoms ) ) ) ) ( in ( the ( compound ( CuSO 4 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ( ( ( contains ( ( ( ( 4 atoms ) ( of O ) ) and ) ( ( 1 atom ) ( of S ) ) ) ) ( for ( ( every ( 1 atom ) ) ( of Cu ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Formulas)) (PP (IN for) (NP (NP (JJ ionic) (NNS compounds)) (SBAR (S (NP (JJ empirical) (NN formula)) (VP (VBZ gives) (SBAR (S (NP (NP (DT the) (JJ elemental) (NN composition)) (PP (IN of) (NP (DT a) (JJ compound) (NN formula)))) (VP (VBZ lists) (S (NP (NNS elements)) (ADJP (JJ present) (PP (IN by) (NP (NN element) (NN symbol) (NNS subscripts)))) (S (VP (VB give) (NP (NP (NNS ratios)) (PP (IN of) (NP (NNS ions) (CC or) (NNS atoms)))) (PP (IN in) (NP (DT the) (JJ compound) (NNP CuSO) (CD 4))))))))))))))) (VP (VBZ contains) (NP (NP (NP (CD 4) (NNS atoms)) (PP (IN of) (NP (NNP O)))) (CC and) (NP (NP (CD 1) (NN atom)) (PP (IN of) (NP (NNP S))))) (PP (IN for) (NP (NP (DT every) (CD 1) (NN atom)) (PP (IN of) (NP (NNP Cu)))))) (. .)))
Formulas for ionic compounds empirical formula gives the elemental composition of a compound formula lists elements present by element symbol subscripts give ratios of ions or atoms in the compound CuSO 4 contains 4 atoms of O and 1 atom of S for every 1 atom of Cu.
(ROOT (S (NP (NP (JJ Ionic) (NN compound) (NNS atoms)) (PP (IN of) (NP (JJ various) (NNS elements)))) (VP (VBP gain) (CC or) (VBP lose) (NP (NNS electrons) (S (VP (TO to) (VP (VB produce) (NP (NNS ions))))))) (. .)))