Uranium
Uranium is a chemical element with symbol U and atomic number 92.
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, with half-lives varying between 159,200 years and 4.5 billion years.
The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99%) and uranium-235 (which has 143 neutrons).
Uranium has the highest atomic weight of the primordially occurring elements.
Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water,
and is commercially extracted from uranium-bearing minerals such as uraninite.[3]
source: Wikipedia
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, with half-lives varying between 159,200 years and 4.5 billion years.
The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99%) and uranium-235 (which has 143 neutrons).
Uranium has the highest atomic weight of the primordially occurring elements.
Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water,
and is commercially extracted from uranium-bearing minerals such as uraninite.[3]
source: Wikipedia
Comments
Post a Comment