Question

Ratio of masses of proton to electron is nearly:

• A. 1.8
• B. $1.8\times {10}^{+3}$
• C. infinite
• D. none of these

Answer 1

The correct option is B $1.8\times {10}^{+3}$

The mass of electron is $9.1\times {10}^{-31}㎏$

The mass of proton is $1.67\times {10}^{-27}㎏$

Thus mass of proton is $\frac{1.67\times {10}^{-27}}{9.1\times {10}^{-31}}\simeq 1.8\times {10}^3$ Mass of electron. Thus answer is option B