Question

Assertion : Atomic mass of aluminium is 27.

Reason : An atom of aluminium is 27 times heavier than 1/12th of the mass of carbon-

12 atom.​

Answer 1

Answer:

(R): An atom of aluminium is 27 times heavier than 1/12th of the mass of the C 12 atom. - A and R are correct, R explains the A. - A is correct, R is wrong.

Explanation:

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Answer 2

Answer:

A is correct

Explanation:

(R): An atom of aluminium is 27 times heavier than 1/12th of the mass of the C 12 atom. - A and R are correct, R explains the A. - A is correct, R is wrong