An isotope means an atom with the same amount of electrons and protons, but with different amount of neutrons.
Relative weight of a neutron is 1, a proton is 1, and an electron is very small. So weight of an atom is approx. mneutrons + m protons.
So, an uranium-235, as U is the 92th atom in Periodic Table, contains 92 protons, 92 electrons to be chargeless, and 143 (=235-92) neutrons.
An uranium-238, from the definition of isotope, contains 92 protons, 92 electrons, and 146 (=238-92) neutrons.
The difference is the 3 neutrons.
The atomic number of uranium is 92, which means that all uranium atoms have 92 protons in their nuclei. They differ in the number of neutrons. Atoms of U-235 have 92 protons and 143 neutrons in their nuclei. Atoms of U-238 have 92 protons and 146 neutrons in their nuclei.
Uranium-235 has 143 neutrons and uranium-238 has 146 neutrons.
Uranium 235 is fissionable with thermal neutrons, uranium 238 practically not. Some details at: http://nuclearweaponarchive.org/Library/Fission.html
U-238 has three neutrons more than U-235.
Has had most of the uranium-235 (an isotope of uranium)) separated out of it.
Uranium-235 is a natural isotope with 143 neutrons. Uranium-231 is an artificial isotope with 139 neutrons.
All the isotopes of uranium contains 92 protons and electrons but a different number of neutrons.
Uranium atom has 92 protons and electrons; the number of neutrons is different for each isotope.
A nuclear reaction between an uranium isotope (e.g. uranium 238) and deuterons.
Has had most of the uranium-235 (an isotope of uranium)) separated out of it.
Uranium-235 is a natural isotope with 143 neutrons. Uranium-231 is an artificial isotope with 139 neutrons.
No uranium is not chemically active
There is no uranium isotope with 234 neutrons. The questioner almost certainly meant the uranium isotope with 234 nucleons, which is a naturally occurring isotope U234 otherwise element 92, with 142 neutrons.In which case its half life would be 252,000 years.
All the isotopes of uranium contains 92 protons and electrons but a different number of neutrons.
Uranium atom has 92 protons and electrons; the number of neutrons is different for each isotope.
A nuclear reaction between an uranium isotope (e.g. uranium 238) and deuterons.
The atomic number of uranium is 92. The number of neutrons of the isotope uranium-235 is 143.
Plutonium and enriched uranium are different materials.Enriched uranium is uranium with a concentration of the isotope 235U greater than the natural concentration of 0,7 %.
Uranium-235 is an isotope of uranium making up about 0.72% of natural uranium.
Uranium-235 is the fissile isotope
Any isotope of uranium is specific. This notion don't exist.