Question

Assertion Atomic mass has no unit but expressed in amu.
Reason It is the average mass of an atom taking care of relative abundance of its all
isotopes.
As Mb​

Answer 1

Answer:

assertion and reason both are correct but reason is not correct explanation

Explanation:

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Answer 2

The assertion and the reason are true and the reason is not the correct explanation of the assertion.

• Atomic mass is defined as the ratio of an atom's average mass to one-twelfth of the relative mass of the C-12 atom.
• Because atomic mass is a ratio, it lacks units but is nevertheless stated in amu. Thus, the assertion is correct.
• One-twelfth of the relative mass of the C-12 atom is one, according to the mathematical equation.
• Thus, atomic mass is equal to the average mass of an atom after accounting for the relative abundance of all of its isotopes. As a result, the reasoning is likewise true.
• As a consequence, we may infer that both the statement and the reason are valid and that the reason is not the proper explanation for the assertion.