Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons.However, because of the tiny amounts found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present.
Here is a list of the top 10 oldest works of Prehistoric art created during the Stone Age.
It features all the major types of Paleolithic art yet discovered, including: petroglyphs (the oldest type of cultural expression), parietal art (like cave painting, as well as hand stencils and other abstract signs) and also mobiliary art (like ivory carving and other portable forms of sculpture).
Uranium is a chemical element with symbol U and atomic number 92.
It is a silvery-white metal in the actinide series of the periodic table.
Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten.