Which of the following represents the value 12 u?

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1 hydrogen atom's mass

Atomic mass of C-12

O-16 atomic mass

$\frac{1}{12}$ th of C-12 atomic mass

answer is D.

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Detailed Solution

An atomic mass unit is defined as exactly $\frac{1}{12}$ th the mass of a carbon-12 atom. The nucleus of the carbon-12 (C-12) atom contains six protons and six neutrons.

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