How many atoms are present in a

(i) H 2 S molecule and

(ii) PO 4 3– ion

 

Answer

(i) H 2 S molecule

Number of atoms = (2 x Hydrogen) + (1 x Sulphate)

                             = 3 atoms

 

(ii) PO 4 3– ion

Number of atoms = (1 x Phosphorus + 4 x Oxygen)

                             = 5 atoms

  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

About the Author

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo