Question

Complete the following sentences:

The mass of a proton is ________ times that of an electron.

Answer 1

$$\begin{gathered} {\mathrm{M}}_{\mathrm{e}}=9.11\times {10}^{-31}\mathrm{kg} \\ {\mathrm{M}}_{\mathrm{p}}=1.67\times {10}^{-27}\mathrm{kg} \\ \frac{{\mathrm{M}}_{\mathrm{p}}}{{\mathrm{M}}_{\mathrm{e}}}=\frac{1.67\times {10}^{-27}\mathrm{kg}}{9.11\times {10}^{-31}\mathrm{kg}}=1840 \\ {\mathrm{M}}_{\mathrm{p}}=1840{\mathrm{M}}_{\mathrm{e}} \end{gathered}$$

Hence, The mass of proton is 1840 times that of an electron.