Uranium radioactively decays, usually by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes, making them useful for …

Feb 6, 2025 · Uranium (chemical symbol U) is a naturally occurring radioactive element. Uranium is a primordial element that is used in nuclear power generation. Uranium is no longer mined …

Aug 16, 2023 · Like all other actinides, uranium is “radioactive” – it decays over time and releases energy in the process. Its special properties make uranium the main source of fuel for nuclear …

Dec 13, 2025 · uranium (U), radioactive chemical element of the actinoid series of the periodic table, atomic number 92. It is an important nuclear fuel. Uranium constitutes about two parts …

Sep 23, 2025 · Uranium was apparently formed in supernovae about 6.6 billion years ago. While it is not common in the solar system, today its slow radioactive decay provides the main source …

It is a radioactive element found naturally in the environment in very small amounts — scientists call these trace amounts — in rock, soil, water systems, such as streams, on plants and as ...

Oct 4, 2020 · Uranium is a radioactive element with atomic number 92 and element symbol U. This gray metal is used in ammunition, armor, nuclear weapons, and nuclear power plants.

Mar 26, 2023 · Uranium decays as alpha particles, and the skin can block such particles. Alpha particles are relatively slow and heavy compared with other forms of nuclear radiation and are …

Apr 17, 2024 · Chemical properties: Weakly radioactive, extremely dense metal (65% denser than lead) Appearance: When it has been refined and enriched, uranium is a silvery-white metal.

Uranium is radioactive and in nature has three primary isotopes with different numbers of neutrons. Natural uranium, 238U, constitutes over 99% of the total mass or weight, with 0.72% …