92 - Uranium actinide
Discovered by Martin Klaproth in 1841
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. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 32 | 2 in 4s + 6 in 4p + 10 in 4d + 14 in 4f |
| 5 | 21 | 2 in 5s + 6 in 5p + 10 in 5d + 3 in 5f |
| 6 | 9 | 2 in 6s + 6 in 6p + 1 in 6d |
| 7 | 2 | 2 in 7s |
Electron shells
238 u Atomic Mass
4.4k K Boiling Point
6 Group
6 Common Oxidation States
1.96 Å Covalent Radius
19.1 g/cm³ Density
50.9 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f3 6d1 Electron Configuration
[Rn] 5f3 6d1 7s2 Electron Configuration (semantic)
1.38 Electronegativity
92 Electrons
6.19 eV First Ionization Energy
3, 4, 5, 6 ICSD Oxidation States
597.6, 1420 kJ/mol Ionization Energies
1.41k K Melting Point
45 Mendeleev Number
27.7 J/(mol·K) Molar Heat
7 Number of Shells
146 Neutrons
92 Atomic Number
15 Number of Isotopes
3, 4, 5, 6 Oxidation States
7 Period
Solid Phase
92 Protons
2, 8, 18, 32, 21, 9, 2 Electron Shell Occupations