103Unknown
Lr 262 Atomic mass · uActinides
Lawrencium
Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series.
Discovery 1961 (Lawrence Berkeley National Laboratory)
K2L8M18N32O32P8Q3
Physical properties
Values for the element in its standard state.
- Density
- Not available
- Melting point
- 1,900K
- Boiling point
- Not available
- Atomic radius
- Not available
- Bonding type
- Not recorded
- Molar heat
- Not available
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 10 electrons; 6s, 2 electrons; 6p, 6 electrons; 5f, 14 electrons; 7s, 2 electrons; 7p, 1 electrons;
[Rn] represents 86 core electrons. The full view shows them explicitly.
103 electrons Orbital order preserved from source
- Electronegativity
- 1.3Pauling scale
- First ionization energy
- Not available
- Electron affinity
- Not available
- Van der Waals radius
- Not available
Lr LawrenciumAtomic number 103
UnknownkJ/mol
Atomic numberGaps indicate unavailable data
About lawrencium
- Appearance
- Not recorded
- Discovery
- 1961 (Lawrence Berkeley National Laboratory)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.