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प्रश्न
Identify the pairs which are not of isotopes?
(i) 126X, 136Y
(ii) 3517X, 3717Y
(iii) 146X, 147Y
(iv) 84X, 85Y
टीपा लिहा
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उत्तर
(iii) 146X, 147Y
(iv) 84X, 85Y
Explanation:
The isotopes are defined as atoms with identical atomic numbers but different mass numbers are known as isotopes.
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