Lr
Lawrencium Symbol (Lr)
Lawrencium is element 103 of the periodic table. Copy its symbol Lr and see its atomic weight, electron configuration and physical properties.
What does Lr mean?
Lr is the chemical symbol for lawrencium, element number 103 in the periodic table. Lawrencium is an actinide in group 3, period 7. It is a solid at room temperature and was discovered in 1961.
Codes and properties
| Chemical symbol | Lr |
|---|---|
| Atomic number (Z) | 103 |
| Mass number (no standard atomic weight) | [266] |
| Group / period | 3 / 7 |
| Element category | actinide |
| Electron configuration | [Rn]7s² 5f¹⁴ 6d¹ |
| State at 20 °C | Solid |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.3 |
| Melting point | 1900 K (1626.85 °C) |
| Discovered | 1961 |
How to type Lr
- Plain text: type
Lr— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Lr}in math mode, or use the mhchem package:\ce{Lr}. - HTML:
Lr; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for lawrencium?
The chemical symbol for lawrencium is Lr.
What is the atomic number of lawrencium?
Lawrencium has atomic number 103, meaning each atom has 103 protons.
What is the electron configuration of lawrencium?
The ground-state electron configuration of lawrencium is [Rn]7s² 5f¹⁴ 6d¹.
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Reference: Lawrencium on PubChem (NIH)