Lawrensium (Lr)
Lawrensium is the chemical element with atomic number 103 and symbol Lr. It is a aktinida in period 7, with a standard atomic weight of 266 u.
Fakta utama
- Z
- 103
- Atomic weight
- 266 u no stable isotope
- Category
- aktinida
- State at 298 K
- Unknown
- Occurrence
- synthetic, radioactive
- Discovered
- 1961
- CAS
- 22537-19-5
Sifat terukur
| Property | Value | Source |
|---|---|---|
| Electronegativity | 1.3 | National Center for Biotechnology Information (NIH) |
| Melting point | 1,900 K | National Center for Biotechnology Information (NIH) |
Konfigurasi elektron
- Noble gas notation
- [Rn] 5f¹⁴ 7s² 7p¹
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 7s² 7p¹
- Electrons per shell
- 2, 8, 18, 32, 32, 8, 3