103 Lr 266
Lawrencium
actinide
Properties
- Atomic number
- 103
- Atomic mass
- 266 u
- Category
- actinide
- Group
- 3
- Period
- 7
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 3
- Electronegativity
- 1.3 (Pauling)
- Density
- —
- Melting point
- 1626.85 °C
- Boiling point
- —
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 7p¹
Noble-gas shorthand: [Rn] 5f¹⁴ 7s² 7p¹
Electrons per shell: 2, 8, 18, 32, 32, 8, 3 — that's 3 in the outermost shell.
About 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.
- Discovered by Lawrence Berkeley National Laboratory
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.