Relative Atomic Mass

Relative Atomic Mass:

• As the mass of an atom is incredibly small we measure their masses relative to/compared to an atom of carbon-12.
• This isotope is used as a standard and given a mass of exactly 12.
• The masses of all other atoms are compared to this.
• For example: the mass of helium -4 is one-third of that of carbon-12. Therefore, its relative mass is 4.
• Relative atomic mass = RAM

The relative mass of an…