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Q.

One atomic mass unit is equal to exactly one-twelfth (1/12th) the mass of one atom of __________.

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a

Silicon-14

b

Carbon-14

c

Nitrogen -14

d

Carbon-12

answer is D.

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Detailed Solution

Carbon-12 isotope is the standard reference used for measuring the atomic masses of various elements.

So, one atomic mass unit is a mass unit equal to exactly one-twelfth (1/12th) the mass of one atom of Carbon-12

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