Question

Which is a factor in determining the average atomic mass of an element?A.) atomic number of the most abundant isotope.B.)relative abundance of each isotope.C.) sum of atomic masses of all isotopes.D.) product of atomic masses of all isotopes. E.)arithmetic mean of atomic masses of the isotopes.

Answer 1

The answer is B.

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Answer 2

Answer: B.)relative abundance of each isotope

Explanation:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

The atomic mass of the elements which exist as isotopes is determined by using the mass of each isotope multiplied by it's fractional abundance and taking the sum of all.