Relative Atomic Mass (AQA GCSE Chemistry): Quizzes

$\frac{1}{12}$th mass of carbon-12

Weighted average

$Ar$ considers all isotopes

Abundance of each isotope

35.5

Different isotopes contribute to it

Periodic table

$\text{Moles} = \frac{\text{Mass}}{Ar}$

Isotope masses and abundances

Relative formula mass ($Mr$)