Answer:-
To work out the relative atomic mass of an element, you need to consider its isotopes and their abundances. Start by multiplying the mass of each isotope by its relative abundance (expressed as a decimal). For example, if an element has two isotopes, one with a mass of 35 and 75% abundance, and another with a mass of 37 and 25% abundance, the calculation would be (35 × 0.75) + (37 × 0.25) = 35.5. This weighted average gives the relative atomic mass, which you can find on the periodic table.
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