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The atoms of different elements having s...

The atoms of different elements having same mass number but different atomic number are known as isobars.
The sum of protons and neutrons, in the isobars is always different.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
The assertion that the isobars are the atoms of different elements having same mass number but different atomic number is correct but reason is false because atomic mass is sum of number of neutrons and protons which should be same for isobars.
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Assertion (A): Two atoms of different elements having same mass number but different atomic numbers are called isobars. Reason (R): Atomic number is the number of protons present and mass number is the total number of protons and neutrons present in a nucleus.

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