Question

What is the mass of an electron in $\mathrm{amu}$?

Answer 1

Electron:

• It is a subatomic particle and is a negatively charged species.
• The symbol of an electron is ${\mathrm{e}}^{-}$.

Mass of electron in $\mathbf{amu}$ (atomic mass unit):

• The mass of an electron in $\mathrm{amu}$ is determined by the mass of an electron $(\mathrm{in}\mathrm{Kg})$ divided by the mass of $1\mathrm{amu}$.
• Mass of electron$=9.109\times {10}^{-31}\mathrm{Kg}$
• Mass of $1\mathrm{amu}=1.66\times {10}^{-27}\mathrm{Kg}$
• Mass of electron in $\mathrm{amu}$$=\frac{\text{Mass of electron in Kg}}{\text{Mass of 1 amu}}=\frac{9.109\times {10}^{-31}\mathrm{Kg}}{1.66\times {10}^{-27}\mathrm{Kg}}$
• So, the mass of the electron $=0.000548\mathrm{amu}$

Therefore, the mass of an electron in $\mathbf{amu}$ is $\mathbf{0}\mathbf{.}\mathbf{000548}\mathbf{}\mathbf{amu}$.