Question

One atomic mass unit (amu) is closest to:

• A. $\text{The mass of oxygen - 16 nucleus}$
• B. $\text{The mass of one proton}$
• C. $\text{The mass of}6.022\times {10}^{23}\text{atoms of hydrogen}$
• D. $\frac{1}{12}\text{the mass of a carbon -12 atom}$

Answer 1

The correct option is D $\frac{1}{12}\text{the mass of a carbon -12 atom}$

One atomic mass unit is equal to $1.66\times {10}^{-27}kg.$ It is equal to 1/12th of the mass of an atom carbon-12. It is abbreviated as amu.