Lawrencium (Lr) — Element 103: Properties & Data | Aladdin Scientific
Lawrencium(Lr) — Element 103
Lawrencium (Lr) is a actinide with atomic number 103 and atomic mass 266.12. It has melting point 1900 K (1627 °C). It sits in period 7 of the periodic table and was discovered in 1961.
Key facts
| Atomic mass | 266.1200 u |
|---|---|
| Electron configuration | [Rn]7s2 5f14 6d1 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.3 |
| Melting point | 1900 K |
| Standard state | Solid |
| Year discovered | 1961 |
Frequently asked questions
What is the electron configuration of lawrencium?
The ground-state electron configuration of lawrencium is [Rn]7s2 5f14 6d1.
What group and period is lawrencium in?
Lawrencium (Lr) is in period 7 (actinide series) of the periodic table, classified as a actinide.
What is the melting point of lawrencium?
Lawrencium melts at 1900 K (1627 °C).
What is the standard state of lawrencium?
Lawrencium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .