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How many atoms are present in a (i) H2S molecule and (ii) PO4^3- ion?

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How many atoms are present in a 

(i) H2S molecule and 

(ii) PO4 3- ion?

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(i) In an H2S molecule, three atoms are present; two of hydrogen and one of sulphur. 

(ii) In a PO43- ion, five atoms are present; one of phosphorus and four of oxygen.

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