Question

Asked Sep 27, 2019

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How many electrons would it take to equal the mass of a helium nucleus?

Step 1

The helium atom has 2 protons, 2 neutrons and 2 electrons. The mass of helium nucleus depends only on 2 protons and 2 neutrons. The mass of proton(m_{p}) is 1.673×10^{-27} kg and the mass of neutron (m_{e})is 1.675 ×10^{-27} kg. The total mass of nucleus (m_{He}) is calculated below.

Step 2

An electron has a mass (me) of 9.1 ×10-31 kg. The number of electrons (ne)that are equal to the mass of Helium (mHe) is calculated by divi...

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