Question

The mass of an electron is _________ times the mass of a proton.

• A. 1840
• B. $\frac{1}{1840}$
• C. $\frac{1}{184}$
• D. 184

Answer 1

The correct option is B $\frac{1}{1840}$

The mass of the electron is very less when compared to the mass of a proton.
$$\begin{array}{cc}\text{Subatomic particle}& \text{Mass (kg)}\\ \text{Proton}& \text{1.67262178}\times {10}^{-27}\\ \text{Neutron}& \text{1.6749}\times {10}^{-27}\\ \text{Electron}& \text{9.10938291}\times {10}^{-31}\end{array}$$
$\frac{Massofproton}{Massofelectron}$= $\frac{1.67262178\times {10}^{-27}}{9.10938291\times {10}^{-31}}$ = 1840

Therefore, the mass of an electron is nearly $\frac{1}{1840}$ times the mass of a proton.