Identify the pairs which are not of isotopes?
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6 X 12 , 6 Y 13
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17 X 35 , 17 Y 37
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6 X 34 , 7 Y 14
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4 X 8 , 2 Y 8
Answer
- 6 X 34 , 7 Y 14
- 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.