Identify the pairs which are not of isotopes?

  1. 6 X 12 , 6 Y 13

  2. 17 X 35 , 17 Y 37

  3. 6 X 34 , 7 Y 14

  4. 4 X 8 , 2 Y 8

Answer

  1. 6 X 34 , 7 Y 14
  2. 4 X 8 , 2 Y 8

 

Explanation: Isotopes are atoms of the same element. They have the same atomic number but different mass number.

Option C and D do not have the same atomic number though the mass numbers are different. So option C and D are not isotopes.

  1. Class 9
  2. Chapter 4 Class 9 - Structure of Atom (Term 2)

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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