3 Li 6.94
Lithium
alkali metal
Properties
- Atomic number
- 3
- Atomic mass
- 6.94 u
- Category
- alkali metal
- Group
- 1
- Period
- 2
- Block
- s-block
- State (room temp)
- Solid
- Outer-shell electrons
- 1
- Electronegativity
- 0.98 (Pauling)
- Density
- 0.534 g/cm³
- Melting point
- 180.5 °C
- Boiling point
- 1329.85 °C
Electron configuration
1s² 2s¹
Noble-gas shorthand: [He] 2s¹
Electrons per shell: 2, 1, which is 1 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Lithium
Lithium (from Greek:λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element.
- Discovered by Johan August Arfwedson
- Appearance: silvery-white
Lithium: frequently asked questions
- What is Lithium?
- Lithium (Li) is the chemical element with atomic number 3. It is a metal: specifically an alkali metal.
- What is the atomic number of Lithium?
- Lithium's atomic number is 3, which means every Lithium atom has 3 protons in its nucleus.
- What is the electron configuration of Lithium?
- The electron configuration of Lithium is 1s2 2s1 (noble-gas shorthand: [He] 2s1). Its electrons are arranged in shells of 2, 1, with 1 in the outermost shell.
- Is Lithium a metal or a nonmetal?
- Lithium is a metal: specifically an alkali metal.
- What group and period is Lithium in?
- Lithium is in group 1 and period 2 of the periodic table.
- Is Lithium a solid, liquid, or gas?
- At room temperature, Lithium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.