Question

Assertion - Mass number of an atom is equal to the number of nucleons present an atom. Reason- Mass number defines the identity of an atom. 1) If both assertion and reason are true an reason is correct explanation of assertion. 2) If both assertion and reason are true but reason is not the correct explanation of assertion. 3) If assertion is true but reason is false. 4) If both assertion and reason are false. 5) If assertion is false but reason is true. Please give the correct answer with explanation.​

Answer 1

Answer:

Assertion is correct but Reason is incorrect

Explanation:

Atomic number defines identity of an atom because each atom has a definite number of protons in its nucleus.

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