Question

Give the atomic mass of :

(a) Magnesium

(b) Calcium

(c) Potassium

Answer 1

Definition of atomic mass:

1. The mass of an atom of a chemical element is known as the atomic mass of that element.
2. The atomic mass is expressed as atomic mass unit $\left(\mathrm{u}\right)$.

Atomic masses of the following elements:

1. Atomic mass of Magnesium $\mathbf{\left(}\mathbf{Mg}\mathbf{\right)}$ is $=24\mathrm{u}$.
2. Atomic mass of Calcium $\mathbf{\left(}\mathbf{Ca}\mathbf{\right)}$ is $=40\mathrm{u}$.
3. Atomic mass of Potassium $\mathbf{\left(}\mathbf{K}\mathbf{\right)}$ is $=39\mathrm{u}$.