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Question


1 u or 1 amu (atomic mass unit) is equal to ___.


Options:
A .   (116)th of the mass of an atom of oxygen.
B .   (112)th of the mass of one atom of carbon 12.
C .   12 carbon atoms.
D .   16 oxygen atoms.
Answer: Option B
:
B

Carbon -12 isotope is used as the standard reference for measuring atomic masses.
1 atomic mass unit is a mass unit equal to exactly (112)th the mass of one atom of carbon 12.

It is expressed as u or amu.



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