How much neutrons have uranium?

Answer 1

Uranium has many isotopes and each isotope has a different number of neutrons (N).

N = atomic weight of the isotope - atomic number of uranium (A=92)

The number of neutrons of the isotope 92U238 is 238-92=146 and the number of neutrons of the isotope 92U235 is 235-92=143.

Answer 2

There are a few different naturally occurring isotopes of uranium. Isotopes are atoms of the same element with differing numbers of neutrons so you need to know what isotope you are considering.

However, since I suspect this might be a homework question ;) I won't come out and give you the answer, but rather, what I would tell my own students:

If you find uranium on the Periodic Table of elements, you will see a number usually at the top of the box. This is the element's atomic number and corresponds to the number of protons in its nucleus. At the bottom, you will see a number that has a whole bunch of digits after the decimal point. This is the element's average Atomic Mass on Earth. The mass of an atom equals the sum of its protons and neutrons. Therefore, you can round the atomic mass to the nearest whole number, subtract out the number of protons (atomic number, remember?) and find the number of neutrons in the most common isotope of that element on Earth.

To show I'm not such a mean teacher, this is a link to the online periodic table entry for uranium. http://www.webelements.com/uranium/

Answer 3

Well the element uranium has an atomic number of 92 and an atomic mass of 238 (most common although it depends on the atomic mass to find the right number of Neutrons) so it has 146 neutrons. (Notice 92+ 146 = 238)

Answer 4

That depends on the isotope. U-235 and U-238 are the most common isotopes, and they indicate having 235 or 238 neutrons in that particular atom. However, if a number like that is not given, it is assumed that the number of protons and neutrons are equal: in Uranium's case, 92.

Answer 5

Number of neutrons in an atomic nucleus = Atomic mass of an isotope - Number of protons in the nucleus.

For uranium the number of protons is 92; each isotope has of course a different mass.

The symbol of the neutron is n.

Answer 6

The number of the neutrons is different for each isotope of uranium; between 125 neutrons in uranium 217 and 150 neutrons in uranium 242.

Answer 7

Uranium-234 has 142 neutrons.
Uranium-235 has 143 neutrons.
Uranium-238 has 146 neutrons.
Number of neutrons = mass number- atomic number

Answer 8

Atomic mass of an isotope of uranium - atomic number of uranium (92) = number of neutrons. Example for uranium 238: 238 - 92 = 146 neutrons

Answer 9

The neutrons number is dependent from the atomic mass of the isotope. Uranium has cca. 30 natural and artifficial isotopes, each with another number of neutrons.

Answer 10

Number of neutrons = Atomic mass of the isotope - Atomic number of the element

Example for 235U: 235 - 92 = 143

The number of neutrons is differnet for each isotope.