Which of the following is the symbol of the unit of atomic mass?

Correct option is A

Correct Answer: (a) u

Explanation:

·         The symbol for the unit of atomic mass is u, which stands for unified atomic mass unit (also referred to as dalton, Da).

·         It is defined as 1/12th the mass of a carbon-12 atom. This unit is commonly used in chemistry and physics to express the masses of atoms and subatomic particles.

Other Options:

• mg: Milligrams (mg) is a unit of mass in the metric system, not specific to atomic masses.
• g: Grams (g) is a basic unit of mass in the metric system but is too large for atomic mass measurement.
• ml: Milliliters (ml) measure volume, not mass, and are unrelated to atomic mass units.