It is a silvery-grey metal in the actinide series of the periodic table.A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years. Uranium is a poor conductor of electricity but it is malleable, ductile, and strongly electropositive. Plutonium 244 u. Nuclear power plants are fueled by uranium; the fuel used is enriched at about 3% uranium. Uranium metal exhibits in three crystallographic modifications: alpha > (688°C) > beta > (776°C) > gamma. DU is an extremely dense and heavy metal, but it is relatively malleable and is used in military armor and armament as well as counterweights on ships and aircraft (HPS 2010b). It is malleable, ductile, slightly paramagnetic, strongly electropositive and is a poor electrical conductor. It is malleable and ductile. It is one of the densest materials known (19 g/cm 3 ), being 1.6 times more dense than lead. Uranium metal is not as stable as U 3 O 8 or UF 4 because it is subject to surface oxidation. When U-235 isotope is collided with slow electrons, it is divided into smaller nuclei, entailing in nuclear chain reaction liberating heat energy. Uranium metal is not as stable as U 3 O 8 or UO 2 because it is subject to surface oxidation. Uranium, being a metal, reacts with most of the nonmetal elements and their compounds. uranium that remain after most of the 235U has been extracted is referred to as depleted uranium (DU). Uranium is naturally radioactive, emitting gamma radiation. It is a poor conductor of electricity, malleable, and ductile. Uranium metal has very high density, being approximately 70% denser than … Uranium metal has a high density of 19.1 g/cm3 and reacts with most nonmetallic elements. Uranium is a dense metal with the chemical symbol U. It is one of the densest materials known (19 g/cm 3 ), being 1.6 times more dense than lead. This was the first-ever use of an atomic bomb in warfare, and it used one famous element to wreak its havoc: uranium. cm −3. Uranium metal has very high density, being approximately 70% denser than lead, but slightly less dense than gold. 2. 1. In its purest form, gold can is a bright yellow, dense, soft, malleable, and ductile metal and is one of the least reactive chemical elements on earth. Barring noble gases, uranium reacts with all non-metals and their compounds with its reactivity proportionately increasing with temperature. With a specific gravity of about 18.7, natural uranium is nearly as heavy as gold (about 19.3). It is malleable, ductile, slightly paramagnetic, strongly electropositive and is a poor electrical conductor. Uranium metal is heavy, silvery white, malleable, ductile, and softer than steel. Uranium is a chemical element with the symbol U and atomic number 92. Uranium metal appears as a heavy, silvery white, malleable, ductile, softer-than-steel, metallic element. Uranium 238.028 u. Characteristics of Uranium. Pure uranium is a silvery white, weakly radioactive metal, which is harder than most elements. Not only is plutonium very dense, but it has a very high atomic weight as well. Uranium can also dissolve in hydrochloric and nitric acid and can also react with cold water when finely divided. Uranium was used for many years as a coloring agent in ceramics As a pure metal, uranium is heavy and metallic. Uranium is both ductile and malleable. It can be found in most of the deposits of rare-earth and uranium compounds but is only extracted from certain ores in a few mines around the world. Uranium is very similar to plutonium in terms of density, atomic weight, and their uses. Uranium oxide was discovered by German chemist Martin Heinrich Klaproth in 1789.