Physics
Assertion (A): 146C and 147N are isobars.
Reason (R): 146C has 6 protons and 8 neutrons in its nucleus, whereas 147N has 7 protons and 7 neutrons in its nucleus.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Answer
Both A and R are true and R is the correct explanation of A.
Explanation
Assertion (A) is true. Isobars have the same mass number but different atomic numbers. Both 146C (carbon-14) and 147N (nitrogen-14) have a mass number of 14, making them isobars.
Reason (R) is true. 146C has 6 protons and 8 neutrons, while 147N has 7 protons and 7 neutrons both have mass number equal to 14, hence are isobars.
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