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Isotopes and Isotones

Atomic mass o...

Question

Atomic mass of an element is not necessarily a whole number becuase :

A

it contains electrons, protons and neutrons

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B

it exists in all tropic forms

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C

it contains isotopes

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D

atoms are no longer indivisible

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Solution

The correct option is C it contains isotopes
The reason the atomic mass is not a whole number is because it's the weighted average mass of the isotopes of that specific element.

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