Answer:-
To find the relative atomic mass of an element, use its isotopes' masses and abundances. Multiply the mass of each isotope by its relative abundance (expressed as a decimal), then add these values together. For example, if an element has two isotopes with masses 10 and 11, and abundances 20% and 80%, calculate as follows: (10 × 0.2) + (11 × 0.8) = 2 + 8.8 = 10.8. This weighted average considers the natural distribution of isotopes, providing the element's average atomic mass as seen on the periodic table. It’s essential for accurate chemical calculations.
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