103Lr
Lawrencium
Actinide
Properties of Lawrencium
- Atomic number (Z)
- 103
- Symbol
- Lr
- Name
- Lawrencium
- Atomic mass
- 262 u
- Period
- 7
- Group
- —
- Family
- Actinides (f-block)
- Classification
- Actinide
- Electron configuration
- [Rn] 5f¹⁴ 7p¹
About Lawrencium
Lawrencium is a chemical element with symbol Lr and atomic number 103 (atomic mass of about 262 u). It is classified as a actinide on the periodic table.
On the periodic table, Lawrencium is located in period 7, outside the numbered groups (f-block), belonging to the actinides (f-block) family. An element's position reveals trends in its properties, such as atomic radius, electronegativity and metallic character.
The electron configuration of Lawrencium is [Rn] 5f¹⁴ 7p¹, which determines how it forms chemical bonds and takes part in reactions.