1.

Which of the following are pairs of isotopes

Answer»

`._(1)^(2)H^(+) and ._(1)^(3)H`
`._(1)^(3)H and ._(2)^(4)H^(-)`
`._(2)^(3)He and ._(2)^(4)He`
`._(6)^(12)C and ._(7)^(14)N^(+)`

Solution :Isotopes have same ATOMIC number but different mass number


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