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2009-12-15 15:09:17
2009-12-15 15:09:17


Uranium 235 and uranium 238 are only natural isotopes of the element uranium.


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Uranium, Plutonium and Thorium...the most common being uranium which when dug out of the ground is 99.3% uranium238 and only 0.7% uranium235. U235 is the nuclei best suited to nuclear fission which means natural uranium is enriched to raise the percentage of U235 to about 3-5% (enriched uranium)...this creates a lot of waste U238 which could be made into plutonium but is usually just stored. If the final use of the uranium is a bomb rather than energy, the enrichment percentage increases far more.

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.

Uranium-235 and uranium-238 are different isotopes of the element uranium. They have different mass numbers due to different numbers of neutrons.

Uranium-235 and uranium-238 are two different natural, radioactive isotopes of uranium.

Depends on the size of your pellet. 1 kg of Uranium235 is equivalent to 1500 tonnes of coal.

Most do. They are called isotopes. For a particular element the number of protons in the nucleus is the same, but there can be different numbers of neutrons. For example uranium235 and uranium238 where the number is called the mass number, which is the sum of the numbers of protons and neutrons in the nucleus. Isotopes of hydrogen are specially given individual names (hydrogen, deuterium, tritium) but they are all "chemically" hydrogen (protons=1, electrons=1).

The two isotopes (or varieties) of the element uranium, U238 and U235 have slightly different weights due to different numbers of neutrons in the nucleus. But, they have the same atomic number (meaning they have the same number of protons in the nucleus and the same number of electrons bound to the nucleus). Because they have the same number of electrons, from a chemical point of view, they are identical: that is, they form the same kinds of bonds with other elements and they cannot be separated by chemical means.

The purpose of a breeder reactor is to produce fissile fuel from non-fissile material. Thus plutonium can be bred from uranium238 which is the most common form of uranium but is not itself fissile. Another route is to breed Uranium 233 from thorium. Of course the breeder reactor would also produce electricity.

Krypton is a gas and Uranium is a solid

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

Uranium-235 is a natural isotope with 143 neutrons. Uranium-231 is an artificial isotope with 139 neutrons.

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

Uranium-235 and uranium-238 are natural, radioactive isotopes of uranium; they have 92 protons and electrons but the number of neutrons is different: - for 235U: 143 - for 238U: 146

Uranium-235 has 143 neutrons and uranium-238 has 146 neutrons. And of course the atomic masses are different.

Uranium is a chemical element with three natural isotopes (234, 235, 238). The natural uranium has cca. 0,72 % uranium-235; uranium with a concentration of uranium-235 under 0,72 % is called depleted uranium; uranium with a concentration of uranium -235 above 0,72 % is called enriched uranium. Uranium in nuclear power and research reactors is used as metal, aloys, uranium dioxide, uranium carbides, uranium silicides, etc.

Uranium is a radioactive metal. Petroleum is a complex mixture of organic compounds. Petroleum is a fossil fuel. All is different between uranium and petroleum. But uranium nuclear fission and petroleum burning release valuable energy.

- the atomic number of carbon is 6 and the atomic number of uranium is 92- carbon has 2 stable isotopes; uranium has only unstable, radioactive isotopes- uranium has fissile or fertile isotopes; carbon hasn't- the electron configuration is very different- the atomic radii are very different- the atomic weights are very differentetc.

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 %.

Absolutely none. Radium is element #88, while uranium is element #92. They are two completely different entities. If you are referring to uranium ores, it is a different story. The ratio is about 3 metric tons of uranium to 1 gram of radium. Oxygen and other elements are also present in uranium ore.

Uranium-235 and uranium-238 are natural isotopes of the one and the same element: uranium. All the isotopes of uranium (natural or artificial) are radioactive.

depends on the amount. Bryan's answer above is correct for the entire amount of an element that is present, but for an individual atom of an element, the answer is yes! Uranium, for instance, exists naturally as three different isotopes, U234, U235 and U238, the difference being the number of neutrons in the nucleas, and therefore, the atomic weights - 234, 235 and 238. In other words, a chunk of Uranium238 will weigh more than an equal sized chunk of 234.

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