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Question

# An electron has a mass of $10 ^ { - 28 }$ grams and a proton has a mass of $10 ^ { - 24 }$ grams. How many times greater is the mass of a proton than the mass of an electron?

Solution

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The ratio of the mass of the proton to the mass of the electron:

\begin{align*} \text {Mass ratio} &=\dfrac {10^{-24}}{10^{-28}} \\ &=10^{-24+28} && \text {Quotient of power property} \\ &\boxed {\color{#c34632}=10^4} \\ \end{align*}

The mass of proton is 10,000 times greater than the mass of electron

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