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What number of protons and neutrons are contained in the nucleus of Uranium-235? Assuming each atom is uncharged, what number of electrons are present?

a) Uranium-235: Protons = 92, Neutrons = 143, Electrons = 92
b) Uranium-235: Protons = 143, Neutrons = 92, Electrons = 92
c) Uranium-235: Protons = 92, Neutrons = 92, Electrons = 92
d) Uranium-235: Protons = 143, Neutrons = 143, Electrons = 143

Answer :

Final answer:

In an atom of Uranium-235, there are 92 protons, 143 neutrons, and 92 electrons.

Explanation:

b. The number of protons in the nucleus of an atom is equal to the atomic number. In this case, Uranium has an atomic number of 92, so there are 92 protons in the nucleus. The mass number of Uranium-235 is 235, so to find the number of neutrons, subtract the atomic number (protons) from the mass number. Therefore, there are 235 - 92 = 143 neutrons in the nucleus.

The number of electrons in a neutral atom is equal to the number of protons. Since Uranium-235 is uncharged, there are 92 electrons present as well.

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