Answer:-
To calculate the relative atomic mass of an element, consider all its isotopes, their masses, and their natural abundance. Multiply the mass of each isotope by its relative abundance (expressed as a decimal), then add these values together. For example, chlorine has two main isotopes: Cl-35 (75% abundance) and Cl-37 (25% abundance). Convert percentages to decimals (0.75 and 0.25), then calculate: ( 35 × 0.75 ) + ( 37 × 0.25 ) = 26.25 + 9.25 = 35.5. (35×0.75)+(37×0.25)=26.25+9.25=35.5. The relative atomic mass of chlorine is approximately 35.5. This weighted average accounts for isotope contributions based on their abundance.
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