3
Li
Lithium
Lithium
Lithium (Li)
Alkali Metals · Solid · Period 2 · Group 1
Element Properties
- Atomic Number
- 3
- Symbol
- Li
- Atomic Mass
- 7
- Category
- Alkali Metals
- Standard State
- Solid
- Period
- 2
- Group
- 1
- Electronegativity
- 0.98
- Atomic Radius
- 182
- Ionization Energy
- 5.39
- Electron Affinity
- 0.62
- Oxidation States
- +1
- Melting Point
- 453.65 K (180.5 °C)
- Boiling Point
- 1615 K (1341.85 °C)
- Density
- 0.534
- Electron Configuration
- [He]2s1
- Year Discovered
- 1817
Electron shells
[He]2s1
Electrons are arranged in shells (principal energy levels) around the nucleus. The diagram is a schematic — orbitals in the same shell are not drawn separately.
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Frequently asked questions
What is the atomic number of Lithium?
The atomic number of Lithium is 3, which equals the number of protons in its nucleus.
What is the atomic mass of Lithium?
The atomic mass of Lithium is approximately 7 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Lithium?
The electron configuration of Lithium is [He]2s1.
Where is Lithium in the periodic table?
Lithium is located in period 2, group 1.
When was Lithium discovered?
Lithium was discovered in 1817.
Related elements
Same group
1
H
Hydrogen
1.008
11
Na
Sodium
22.99
19
K
Potassium
39.098
37
Rb
Rubidium
85.468
55
Cs
Cesium
132.905
87
Fr
Francium
223.02