Question

Assertion (A): Atomic mass is expressed in atomic mass unit.

Reason (R) : Atomic mass is defined as $$\frac{1}{12}$$ times the mass of carbon-12.

Options

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

A is true but R is false.

Explanation:

Atomic mass is expressed in atomic mass units, so A is true. The reason gives the definition of one atomic mass unit, not atomic mass itselfm so R is false.