Assertion : Atomic mass of calcium is 40 u
Reason : An atom of calcium is 40 times heavier than an atom of carbon with mass 12 u.

An atom of sulphur is __ times heavier than an atom of carbon.

Assertion : atomic mass of aluminium is 27 Reason : an atom of aluminium is 27 times heavier than (1)/(12 ^(th)) of the mass of the C- 12 atom .

Assertion (A): Atomic mass of potassium is 39. Reason (R ): An atom of postassium is 39 times heavier than 1//2th of the mass of carbon atom (C^(12)) .

Assertion (A): Atomic mass of potassium is 39. Reason (R ): An atom of postassium is 39 times heavier than 1//2th of the mass of carbon atom (C^(12)) .