Question

What is the ratio of mass of an electron to the mass of a proton?

• A. $1:2$
• B. $1:1$
• C. $1:1837$
• D. $1:3$

Answer 1

Answer: (C)

Electron $\frac{1}{1837}$time lighter than proton so their mass ratio will be $1:1837.$
rati $=\frac{1.67\times 10^{-27}}{9.1\times 10^{-31}}=1837$