Difference between uranium 235 and 238?

Answer 1

235U and 238U are two different isotopes of natural uranium.

235U has 143 neutrons and 238U has 146 neutrons.

The Atomic Mass of 235U is 235,043 929 918 ± 0,000 001 957 and the atomic mass of 238U is 238,050 788 247 ± 0,000 002 044.

235U is fissionable with thermal neutrons but 238U not; another nuclear properties are also very different; the chemical properties are the same.

Answer 2

Uranium-235 contains 143 neutrons and uranium-238 contains 146 neutrons. Uranium-235 is the primary isotope used for nuclear power and weapons due to its ability to sustain a nuclear chain reaction. Uranium-238 is more abundant in nature but is less reactive in nuclear reactions.

Answer 3

When you see these numbers after elements, it indicated the ISOTOPE.

Now, in the atom's nucleus, you have Neutrons & Protons. If the number of Protons change, then you have a different element. But, if the number of Neutrons change, then you have the same element, just with different number of neutrons, which affects the way that particular isotope behaves in certain circumstances.

So, Uranium has 92 protons in its nucleus (this doesn't change). Uranium 238 has 238 particles in its nucleus, 92 of which are protons. So, 238-92= 146 neutrons in the nucleus (Number [minus] Protons = Neutrons).

Uranium 235 will have: 235-92= 143 neutrons in its nucleus.

Answer 4

Uranium 235

- neutrons: 143

- atomic mass: 235,043 929 918 ± 0,000 001 957

- half life: 7,038.108 years

- concentration in natural uranium: 0,7204 %

- 235U is a fissile isotope

Uranium 238

- neutrons: 146

- atomic mass: 238,050 788 247 ± 0,000 002 044

- half life: 4,468.109 years

- concentration in natural uranium: 99,2742 %

- 238U is a fertile isotope

Answer 5

Uranium-235: 92 protons, 143 neutrons; fissionable with thermal neutrons;

Uranium-238: 92 protons, 146 neutrons; fissionable with fast neutrons; the atomic mass is greater with 3 compared with the atomic mass of uranium-235.

Answer 6

It differs in the amount of neurons present in the core of the molecule. U-238 is being used in Nuclear Powerplants.

Answer 7

U-235 and U-238 are natural radioactive isotopes.

Answer 8

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

Answer 9

U-238 has 238 particles in its nucleus and U-235 only has 235

Answer 10

These atoms have different numbers of neutrons and show different radioactive series.