What are isotopes?
Atoms of the same elements which have the same number of protons but a different number of neutrons.
What is relative atomic mass?
The weighted average of an atom based of the natural abundance of the element’s isotopes.
How do you calculate relative atomic mass?
([Mass number of isotope 1][Percentage of occurence of isotope 1]) +( [Mass number of isotope 2][Percentage of occurence of isotope 2])
Divide everything by 100