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Gram Atomic Mass

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Question

The relative atomic masses of carbon and oxygen are 12 u and 16 u respectively. What is meant by u in this statement.

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Solution

'u' signifies unified atomic mass.
It is a non-Si unit of mass. It can be defined as 1/12th mass of carbon-12 atom while in its ground state. It is used to express mass of atomic particles.
u â‰ˆ1.6605 * 10^-27kg

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