Question

The mass of an electron is about $\frac{1}{2000}$times that of a proton.

• A. True
• B. False

Answer 1

The correct option is A True

Proton and Electron:

1. Both of them are subatomic particles.
2. The electron is a subatomic particle that revolves around the nucleus whereas a proton is a subatomic particle in the nucleus with a positive charge.
3. Mass of electron $=9.10\mathrm{x}{10}^{-31}\mathrm{kg}$ and mass of a proton$=1.67\times {10}^{-27}\mathrm{kg}$.
4. $\frac{\mathrm{Ratio}\mathrm{of}\mathrm{mass}\mathrm{of}\mathrm{proton}}{\mathrm{Ratio}\mathrm{of}\mathrm{mass}\mathrm{of}\mathrm{electron}}=\frac{1.67\times {10}^{-27}\mathrm{kg}}{9.1\times {10}^{-31}\mathrm{kg}}$

$$\begin{gathered} =0.1835\times {10}^4 \\ =1835 \end{gathered}$$

5. Because protons are around $1835$ times heavier than electrons, the mass of an electron is about $\frac{1}{1835}$ that of a proton, making the difference negligible.

Therefore, the given statement is true.