What is the difference between uranium 235 and uranium-238?
Uranium-235 and U-238 are chemically identical, but differ in their physical properties, notably their mass. The U-238 nucleus also has 92 protons but has 146 neutrons – three more than U-235 – and therefore has a mass of 238 units.
Why do uranium 235 and uranium-238 have different mass numbers?
U-238 is the most abundant uranium followed by U-U- 235 and 234. The difference between the three isotopes is the number of neutrons present in the nucleus. U-238 has 4 more neutrons than U-234 and three more neutrons than U-235. U-238 is more stable thus being more abundant naturally.
What are the molar masses of uranium and uranium?
(For more information, see Section 1.6 ) Similarly, the molar mass of uranium is 238.03 g/mol, and the molar mass of iodine is 126.90 g/mol.
What does the 235 represent in uranium 235?
Uranium-235 (235U) is an isotope of uranium making up about 0.72\% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction….Uranium-235.
| General | |
|---|---|
| Symbol | 235U |
| Names | uranium-235, U-235 |
| Protons | 92 |
| Neutrons | 143 |
Why U-235 is more fissile than U-238?
U- 235 is a fissile isotope, meaning that it can split into smaller molecules when a lower-energy neutron is fired at it. U- 238 has an even mass, and odd nuclei are more fissile because the extra neutron adds energy – more than what is required to fission the resulting nucleus.
What is the atomic mass of uranium 235?
Uranium-235 is a radioactive isotope of uranium. Uranium-235 has 143 neutrons, 92 protons, and an isotope mass of 235.0439299. Uranium-235 has 235Pa, 235Np, and 239Pu as its parent isotopes. As it decays, it produces 231Th.
Why is uranium 235 unstable?
All isotopes of uranium are unstable and radioactive, but uranium 238 and uranium 235 have half-lives which are sufficiently long to have allowed them to still be present in the Solar System and indeed on Earth.
What is the atomic number for uranium 235?
Uranium is a radioactive element of the actinide series of metals. It has an atomic symbol U, atomic number 92, and atomic weight 238.03. U-235 is used as the fissionable fuel in nuclear weapons and as fuel in nuclear power reactors.
What element is formed during the alpha decay of uranium 235?
The decay chain of this radioactive metal is known as the Actinium Series withThorium-231 being the next isotope in this decay process. It makes Thorium -231 the daughter nuclide of this isotope. Uranium-235 is also known as Actinouranium as it is the parent isotope of the Actinium Series.