What is the relative atomic mass of an element?
The weighted mean of its isotopes’ relative masses, accounting for their abundances.
Cambridge IGCSE (9–1) Chemistry 0971 (Extended) (2026–2028) · 2.3
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What is the relative atomic mass of an element?
The weighted mean of its isotopes’ relative masses, accounting for their abundances.
How is relative atomic mass calculated from isotopic masses and abundances?
Multiply each isotopic relative mass by its abundance, add the products, then divide by the sum of the abundances. For percentage abundances, divide by 100.
How does an isotope’s abundance affect its contribution to relative atomic mass?
A more abundant isotope contributes more to the result than a less abundant isotope.