Question

What is the difference expressed in kilograms between the mass of a proton and the mass of an electron?

Answer 1

Answer: The difference is $9.9908907\times10^{-28}kg$.

Solution:

$\text{Mass of proton}=1.672629\times10^{-24}g$

and

$\text{Mass of electron}=9.1093835\times10^{-28}g$

Converting masses into kilograms,

Conversion factor: 1kg=1000grams

$\text{Mass of proton}=1.672629\times10^{-27}kg$ and

$\text{Mass of electron}=9.1093835\times10^{-31}kg$

Difference in their masses would be,

Difference = Mass of proton - Mass of electron

$\text{Difference}=(1.6726219\times10^{-27}kg)-(0.00091093\times10^{-27}kg)$

$Difference=9.9908907\times10^{-28}kg$