How many neutrons does Uranium-238 have if it has 92 protons?

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Answer 1 · 2018-04-08T07:15:10

See explanation.

The mass number is #238#, so the nucleus has #238# particles in total, including #92# protons.

So to calculate the number of neutrons we have to subtract:

#238-92=146#

Answer: The atom has #146# neutrons.

Answer 2 · 2018-04-08T09:35:30

#146#

The mass of uranium-#238# is #238# mass units. The total mass of an element is the sum of its protons and neutrons.

There are #92# protons in this isotope, and its mass is #238#, so that means that there are,

#238-92=146# neutrons