Question

1 amu is defined as:

Options

• Mass of one proton

• 1/12th mass of C-14

• 1/12th mass of C-12

• Mass of one neutron

Answer 1

1/12th mass of C-12

Explanation:

\[1\mathrm{~amu}=\frac{1}{12}\text{ of the mass of }_{6}^{12}\mathrm{C}=1.66\times10^{-27}\mathrm{~kg}.\]