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

2 Answers
Apr 8, 2018

Answer:

See explanation.

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.

Apr 8, 2018

Answer:

#146#

Explanation:

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