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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.
Wiki User
∙ 11y ago
Wiki User
∙ 9y agoWhen 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.
Wiki User
∙ 13y agoUranium 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
Wiki User
∙ 12y agoUranium-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.
Wiki User
∙ 13y agoIt differs in the amount of neurons present in the core of the molecule. U-238 is being used in Nuclear Powerplants.
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∙ 13y agoU-235 and U-238 are natural radioactive isotopes.
Wiki User
∙ 12y agoU-238 has 238 particles in its nucleus and U-235 only has 235
Wiki User
∙ 11y agoThese atoms have different numbers of neutrons and show different radioactive series.
Wiki User
∙ 15y agoUranium 235 has 92 neutrons and uranium 238 has 95 neutrons.
Wiki User
∙ 12y ago1
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What are the similarities and differences between the isotopes uranium 235 and uranium 238?
Uranium-235 has 143 neutrons and uranium-238 has 146 neutrons. And of course the atomic masses are different.
What letter would a chemist use in front of 235 or 238?
U from uranium235U and 238U (recommended); also possible U-235 and U-238 or uranium-235 and uranium-238.
Which is more explosive uranium-238 or uranium-235?
235 was used to produce one of the first atomic weapons. 238 is much harder to start a nuclear chain reaction than 235. 238 is used in nuclear weapons, but not as the first stage.
What are the similarities and differences between the isotopes uranium-235 and uranium-238?
Uranium-235 and uranium-238 are the isotopes of the same element - uranium, a natural radioactive chemical element; the atomic number is the same - 92. Also the electronic structure, the number of protons, etc. Differences: atomic mass, number of neutrons, U-235 is fissile with thermal neutrons but U-238 is only fertile, halflife, type of disintegration types and energy of emitted radiations, etc.
What element if often enriched and used in nuclear bombs?
Uranium is enriched in the isotope uranium-235, producing uranium-238 as waste.
What are the similarities and differences between the isotopes uranium 235 and uranium 238?
Uranium-235 has 143 neutrons and uranium-238 has 146 neutrons. And of course the atomic masses are different.
Uranium -235 and uranium -238 are different of uranium?
Isotopes Uranium 235 and uranium 238 are only natural isotopes of the element uranium.
Are uranium 235 and uranium 238 said to be radioactive molecules since they have the same number of protons but different numbers of neutrons?
No, Uranium-235 and uranium-238 are radioactive, natural isotopes (not molecules, but atoms) of the one and the same element: uranium.Both with 92 protons and 235-92 = 143 neutrons in U-235 but 146 neutrons in U-238.
How is the structure of an atom of uranium 235 different from the structure of an astom of uranium 238?
Uranium-235 has 143 neutrons, uranium-238 has146 neutrons.
How is the structure of an atom or uranium 235 dfferent to the structure of an atom of uranium 238?
Uranium-235 has 143 neutrons and uranium-238 has 146 neutrons.
Uranium 235 and Uranium 238 are said to be what kind of radioactivity?
Uranium 235 and uranium 238 are especially alpha particles emitters. They are natural radioactive isotopes.
Uranium-235 and uranium-238 are different?
Uranium-235 and uranium-238 are different isotopes of the element uranium. They have different mass numbers due to different numbers of neutrons.
What letter would a chemist use in front of 235 or 238?
U from uranium235U and 238U (recommended); also possible U-235 and U-238 or uranium-235 and uranium-238.
What are the half lives for uranium-235 and uranium-238?
703, 800,000
How much uranium-235 is typically found in uranium ore when it is mined from the ground?
Uranium-235 is found in nature at about 0.7% concentration to uranium-238.
How many neutrons are in uranium 235 and uranium 238 respectively?
143 & 146
What are the fertile isotopes of Uranium?
There are many isotopes for uranium, the most abundant of them in nature are:Uranium- 234, having 142 neutron and 92 protonUranium- 235, having 143 neutron and 92 protonUranium- 238, having 146 neutron and 92 protonThe abundance of these three isotopes in natural uranium is:Uranium-234: 0.006 %Uranium-235: 0.720 %Uranium-238: 99.274 %
