The mass of an electron is 9.109 × 10-31lkilograms, while the mass of a proton is 1.673×10-27lkilograms.

You are watching: How many electrons does it take to the equal the mass of a proton?

1) Set up a dimensional evaluation.

2) Notice that the kilograms of the proton and also electrons cancel out.

3) Do the math (1.673×10-27 separated by 9.109×10-31)

4) You"re left via the amount of electrons over 1 proton.

1 electron 1.673×10-27 kg

----------------- x ----------------- = 0.18366 x104 =1836.6 ~1837 electrons equal the mass of a proton.

9.109×10-31kg 1 proton

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