103Lr266.120
Lawrencium
Actinide
Solid at STP
Period 7Block FDiscovered 1961
[Rn]7s2 5f14 6d1
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.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 103 |
| Atomic Mass | 266.120 u |
| Electron Configuration | [Rn]7s2 5f14 6d1 |
| Oxidation States | +3 |
| Electronegativity | 1.3 (Pauling) |
| Block | F |
Physical Properties
| Standard State | Solid |
| Melting Point | 1900 K (1626.8 °C) |
| CPK Color | #C70066 |
Classification
| Category | Actinide |
| Group Block | Actinide |
| Period | 7 |
| Block | F |
Discovery
| Year Discovered | 1961 |
| Discovered By | Lawrence Berkeley National Laboratory |
| Electron Shells | 2, 8, 18, 32, 32, 8, 3 |