Lithium (Li)
Lithium
Lithium (Li) is an alkali metal in period 2, group 1. Its relative atomic mass is 6.94 and the molar mass of the atom is 6.94 g/mol.
Atomic number 3
Atomic mass 6.94
Molar mass 6.94 g/mol
Category Alkali metal Solid
Properties of lithium
| Atomic number | 3 |
|---|---|
| Symbol | Li |
| Latin name | Lithium |
| Relative atomic mass | 6.94 |
| Molar mass | 6.94 g/mol |
| Group, period, block | 1, 2, s |
| Category | Alkali metal |
| State at 20 °C | Solid |
| Electron configuration | [He] 2s¹ |
| Electronegativity (Pauling) | 0.98 |
| Atomic radius | 145 pm |
Electron configuration of lithium
Electrons per shell
K2L1
Full notation
1s² 2s¹
Noble-gas notation
3 protons · 3 electrons[He] 2s¹
Formula and compounds of lithium
Simple substanceLilithiumMolar mass of Li: 6.94 g/mol
Chemistry not clicking? Try a lesson with a tutor
1-to-1 online chemistry lessons for KS3, GCSE and A-level. Your first lesson is a free trial.
Frequently asked questions
The relative atomic mass of lithium is 6.94, so the molar mass of the atom is 6.94 g/mol.
Full: 1s² 2s¹. Noble-gas notation: [He] 2s¹.