Question

This is the weighted average of all of the isotopes of an element.

Answer 1

Explanation:

mass of first isotope(%of first isotope)+mass of second isotope (%of second isotope)/100

Answer 2

Weighted average mass is the average of all the isotopes mass multiplied by their relative abundance in nature.

Explanation:

We know, atoms having same number of electrons but different atomic mass are known as isotopes.

We know, periodic table uses atomic number for the placement of electrons.

So, there are different isotopes of different elements having different properties and putting all of them in periodic table not a great option.

So , weighted average atomic mass is the average of all the isotopes mass multiplied by their relative abundance in nature.

Here, relative abundance is the percentage of a specific atomic mass isotope present in naturally occurring element.

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Weighted average atomic mass.

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