Question

The atomic mass unit (amu) is

a. the mass of a single atom of carbon
b. one millionth of a gram
c. approximately the mass of a proton
d. approximately the mass of an electron

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Answer 1

The correct option is (a).

Step-by-step explanation:

One Atomic mass unit is the mass of an atom. It is defined as the mass of a single carbon -12 at rest.

The relation between amu and kg is given by :

Hence, one amu is equal to the mass of a single atom of carbon.