Question

Give Reason -

Atomic mass number is a whole number.

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Answer for 10 points

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Answer 1

Answer:

Since everything has a mass even an atom so atomic mass is always a whole number i.e. starting from 0.It can never be negative.

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Answer 2

• The atomic mass reported on a periodic table is the weighted average of all the naturally occuring isotopes. Being an average it would be most unlikely to be a whole number. The mass of an individual atom in atomic mass units is the mass relative to carbon-12. Only carbon-12 has a mass exactly equal to itself.