Answer:-
To calculate relative atomic mass, you take the average mass of all the naturally occurring isotopes of an element, weighted by their abundance. Multiply the mass of each isotope by its percentage abundance (in decimal form), then sum these values. For example, if an element has two isotopes, one with a mass of 10 and 75% abundance, and the other with a mass of 11 and 25% abundance, the calculation is (10 × 0.75) + (11 × 0.25) = 10.25. The result is divided by 1/12 the mass of a carbon-12 atom, but this step is standardized for simplicity.
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