Question

Give reason why atomic weights are expressed in a.m.u.​

Answer 1

a.m.u stand for Atomic Mass Unit. It is used to measure atomic and molecular masses. These masses are approximately the sum of the masses of protons and neutrons present inside the nucleus. It is a unit with very small value hence, it is used for measuring the atomic and molecular masses. It is also used to find the relative masses of various isotopes of elements.

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Answer 2

Explanation:

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The standard unit for expressing the mass of atom is amu (atomic mass unit).It is equal to 1/12 of the mass of an atom of carbon-12 equal to 1.6605×10 −19 g.

amu is also called as avogram.

Avogram is a unit of mass and weight equal to one gram divided by the Avogadro's number.

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