Answer:
We know that, mass of electron\[({{m}_{e}})=0.0005486\text{ }amu\] mass of proton\[({{m}_{p}})=1.00727\text{ }amu\] \[\frac{{{m}_{e}}}{{{m}_{p}}}=\frac{0.0005486}{1.00727}\approx \frac{1}{1836}\]
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