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Question

Which of the following is the standard for atomic mass?

A
11H
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B
126C
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C
146C
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D
168C
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Solution

The correct option is B 126C
An atomic mass unit (symbolized amu) is defined as precisely 1/12 the mass of an atom of carbon-12. The carbon-12 (C-12) atom has six protons and six neutrons in its nucleus.

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