Page 2 - 4.HOME ASSIGNMENT-(ISOTOPES AND ISOBARS)TRONS IN VARIOUS SHELLS)
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(b) What is the mass number of Y?
                          (c) What is the relationship between X and Y?
            Q.4       Find the number of sub-atomic particles in all the isotopes of Hydrogen  3        Av/A
                      and state how they are different from each other?

            Q.5           (a) What are isotopes? Give one example.                              5       Av/A
                          (b) Write two differences between isotopes and isobars.
                          (c) State two uses of isotopes.








































































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