A typical bacterium has a diameter of about 10^{-6} meters. A hydrogen atom has a diameter of about 10^{-10} meters. How many times smaller than a bacterium is a hydrogen atom?

Start with dividing the smaller number from the larger number.

10^-6 / 10^-10 = 10000 or 10^4

So the hydrogen atom is 10^4 times smaller than the bacterium.

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