- 🇬🇧 Uranium
- 🇺🇦 Уран
- 🇨🇳 鈾
- 🇳🇱 Uraan
- 🇫🇷 Uranium
- 🇩🇪 Uran
- 🇮🇱 אורניום
- 🇮🇹 Uranio
- 🇯🇵 ウラン
- 🇵🇹 Urânio
- 🇪🇸 Uranio
- 🇸🇪 Uran
- 🇷🇺 Уран
- Name: uranium
- Symbol: U
- Atomic number: 92
- Relative atomic mass (Ar): 238.02891 (3) [see notes g m
- Standard state: solid at 298 K
- Appearance: metallic grey
- Classification: Metallic
- Group in periodic table:
- Group name: Actinoid
- Period in periodic table: 7 (actinoid)
- Block in periodic table: f
- Shell structure: 2.8.18.32.21.9.2
- CAS Registry: 7440-61-1
Uranium atoms have 92 electrons and the shell structure is 2.8.18.32.21.9.2. The ground state electronic configuration of neutral uranium is [Rn].5f3.6d1.7s2 and the term symbol of uranium is 5L6.
Uranium: description
Uranium is of great interest because of its application to nuclear power and nuclear weapons. Uranium contamination is an emotive environmental problem. It is not particularly rare and is more common than beryllium or tungsten for instance.
uranium
This sample is from The Elements Collection, an attractive and safely packaged collection of the 92 naturally occurring elements that is available for sale.
Science and Ink cartoon for uranium
Cartoon by Nick D Kim ([Science and Ink], used by permission).
Uranium gives interesting yellow and green colours and fluorescence effects when included to glass in conjunction with other additives. The image below is an English amphora dating to about 1930 showing a characteristic yellow-green colour. The image is reproduced with the permission of Ken Tomabechi (Uranium Glass Gallery in Japan), where you can find further information about uranium glass. This type of glass is sometimes referred to as "vaseline glass" in the UK and USA and as "Annagelb" (yellow) or "Annagruen" (green) in Germany.
uranium glass
Uranium: physical properties
- Density of the chemical elements on a miniature periodic table spark table Density of solid: 19050 kg m-3
- Molar volume of the chemical elements on a miniature periodic table spark table Molar volume: 12.49 cm3
- Thermal conductivity of the chemical elements on a miniature periodic table spark table Thermal conductivity: 27.6 W m‑1 K‑1
Uranium: heat properties
- Melting point on a miniature periodic table spark table Melting point: 1405.3 [1132.2 °C (2070 °F)] K
- Boiling point on a miniature periodic table spark table Boiling point: 4200 [ca.3900 °C (7101 °F)] K
- Enthalpy of fusion on a miniature periodic table spark table Enthalpy of fusion: 20.5 kJ mol-1
Uranium: atom sizes
- Atomic radius (empirical) of the chemical elements on a miniature periodic table spark table Atomic radius (empirical): 175 pm
- Covalent (single bond) radius on a periodic table spark table Molecular single bond covalent radius: 170 (coordination number 3,6) ppm
- van der Waals radius on a periodic table spark table van der Waals radius: [ 305 ] ppm
Uranium: electronegativities
- Pauling electronegativity of the chemical elements on a miniature periodic table spark table Pauling electronegativity: 1.38 (Pauling units)
- Allred-Rochow electronegativity of the chemical elements on a miniature periodic table spark tableAllred Rochow electronegativity: 1.22 (Pauling units)
- Mulliken-Jaffe electronegativity of the chemical elements on a miniature periodic table spark tableMulliken-Jaffe electronegativity: (no data)
Uranium: orbital properties
- First ionization energy the chemical elements on a miniature periodic table spark table First ionisation energy: 597.63 kJ mol‑1
- Second ionization energy the chemical elements on a miniature periodic table spark table Second ionisation energy: 1120 kJ mol‑1
- Third ionization energy the chemical elements on a miniature periodic table spark table Third ionisation energy: 1910 kJ mol‑1
Uranium: abundances
- Chemical elements abundance by weight in the universe on a miniature periodic table spark tableUniverse: 0.2 ppb by weight
- Chemical elements abundance by weight in the earth's crust on a miniature periodic table spark tableCrustal rocks: 1800 ppb by weight
- Chemical elements abundance by weight in humans on a miniature periodic table spark tableHuman: 1 ppb by weight
Uranium: crystal structure
Uranium: biological data
- Human abundance by weight of the chemical elements on a miniature periodic table spark table Human abundance by weight: 1 ppb by weight
Uranium has no biological role.
Uranium: uses
Uranium: reactions
Reactions of uranium as the element with air, water, halogens, acids, and bases where known.
Uranium: binary compounds
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of uranium where known.
Uranium: compound properties
Bond strengths; lattice energies of uranium halides, hydrides, oxides (where known); and reduction potentials where known.
Uranium: history
Uranium was discovered by Martin Klaproth in 1789 at Germany. Origin of name: named after "the planet Uranus".Uranium: isotopes
Uranium: isolation
Isolation: coming soon!