Uranium is a natural chemical element, a metal and is radioactive.
Uranium is a metal, natural, radioactive. Uranium exist only as minerals in the nature. Soils contain traces of uranium.
In nature, uranium is found as uranium-238 (99.284%), uranium-235 (0.711%),[4] and a very small amount of uranium-234 (0.0058%)
It is impossible to know exactly this value; probably approx. 5.109 tons. But only a very small part of this quantity is economically to extract today.
I believe it is Uranium. All elements heavier than uranium are man-made. Here's an interesting article... http://space.newscientist.com/article/dn13828-has-the-heaviest-element-been-found.html
Uranium-235 and uranium-238 are isotopes of uranium, meaning they have the same number of protons but different numbers of neutrons. Uranium-235 is used in nuclear reactors and weapons due to its ability to sustain a nuclear chain reaction, while uranium-238 is more abundant in nature but less useful for these purposes.
Uranium is a natural chemical element, metal, radioactive.
Uranium is a metal, natural, radioactive. Uranium exist only as minerals in the nature. Soils contain traces of uranium.
In nature, uranium is found as uranium-238 (99.284%), uranium-235 (0.711%),[4] and a very small amount of uranium-234 (0.0058%)
Uranium-235 is found in nature at about 0.7% concentration to uranium-238.
Uranium is a metallic element and is not classified as an acid or a base. It is a radioactive element that can be found in nature as uranium-238 and uranium-235 isotopes.
Uranium is primarily found in the Earth's crust in the form of uranium oxides, such as uraninite. These minerals can exist as solid deposits in rocks or as part of sedimentary layers. Due to its radioactive nature, uranium undergoes decay processes that produce various daughter isotopes, contributing to its radioactivity.
It is impossible to know exactly this value; probably approx. 5.109 tons. But only a very small part of this quantity is economically to extract today.
Yes
Uranium - for economical exploitation - exist in mines.But uranium is is a common element in all rocks, all waters, building materials, soils etc.
no. uranium and thorium occur in nature
I believe it is Uranium. All elements heavier than uranium are man-made. Here's an interesting article... http://space.newscientist.com/article/dn13828-has-the-heaviest-element-been-found.html
Uranium-235 and uranium-238 are isotopes of uranium, meaning they have the same number of protons but different numbers of neutrons. Uranium-235 is used in nuclear reactors and weapons due to its ability to sustain a nuclear chain reaction, while uranium-238 is more abundant in nature but less useful for these purposes.