How many neutrons are in uranium-235 and uranium-238 respectively?

Answer 1

The element uranium (U) has 92 protons in its nucleus. That's where its atomic number comes from. When we see an isotope of an element written in "standard" form, the element name or symbol will be followed by the Atomic Mass (atomic weight) of the isotope. This number is basically the number of protons and neutrons (called nucleons when they are in an atomic nucleus) in an atom. In this case, we have U-235 and U-238. In the first case, 235 - 92 = 143, so U-235 has 143 neutrons. In the second case, 238 - 92 = 146, so U-238 has 146 neutrons. See the Related Questions below for how to find the number of neutrons in any atom.

Answer 2

Uranium-235 has 143 neutrons, and uranium-238 has 146 neutrons.

Answer 3

The neutral atom of uranium (any isotope) has 92 electrons.

Answer 4

92 protons for all isotopes of uranium because the atomic number is 92.

Answer 5

The isotope 238U has 92 protons; all the isotopes of uranium have 92 protons.

Answer 6

Protons = 92 Neutrons 238-92 = 146