MCQ
Identify the pairs which are not of isotopes?
- A$^{13}_6\text{X},\ ^{13}_6\text{Y}.$
- B$^{35}_{17}\text{X},\ ^{37}_{17}\text{Y}.$
- C$^{14}_6\text{X},\ ^{14}_7\text{Y}.$
- D$^{8}_4\text{X},\ ^{8}_5\text{Y}.$
✓
Answer
-
$^{14}_6\text{X},\ ^{14}_7\text{Y}.$
-
$^{8}_4\text{X},\ ^{8}_5\text{Y}.$
Explanation:
Isotopes have the same atomic number but different mass number.
$\therefore\ \Big(\ ^{14}_{6}\text{X},\ ^{14}_{7}\text{Y}\Big)$ and $\Big(\ ^8_4\text{X},\ ^8_5\text{Y}\Big)$ are not isotopes.
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