Average Atomic Mass

### Formula:

$$\text{Average Atomic Mass}=\sum_{ }^{ }(\text{Isotopic Mass}\times\text{Fractional Abundance})$$

### Terminologies:

- **Average Atomic Mass** → Weighted average mass of naturally occurring isotopes of an element.

- **Isotopic Mass** → Mass of a particular isotope of an element.

- **Fractional Abundance** → Relative amount of an isotope present in nature.

### Usage:

- Used to calculate atomic mass of elements having multiple isotopes.