12 Mg 24.305
Magnesium
alkaline earth metal
Properties
- Atomic number
- 12
- Atomic mass
- 24.305 u
- Category
- alkaline earth metal
- Group
- 2
- Period
- 3
- Block
- s-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.31 (Pauling)
- Density
- 1.738 g/cm³
- Melting point
- 649.85 °C
- Boiling point
- 1089.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s²
Noble-gas shorthand: [Ne] 3s²
Electrons per shell: 2, 8, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Magnesium
Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (Group 2, or alkaline earth metals) of the periodic table:they each have the same electron configuration in their outer electron shell producing a similar crystal structure. Magnesium is the ninth most abundant element in the universe.
- Discovered by Joseph Black
- Appearance: shiny grey solid
Magnesium: frequently asked questions
- What is Magnesium?
- Magnesium (Mg) is the chemical element with atomic number 12. It is a metal: specifically an alkaline earth metal.
- What is the atomic number of Magnesium?
- Magnesium's atomic number is 12, which means every Magnesium atom has 12 protons in its nucleus.
- What is the electron configuration of Magnesium?
- The electron configuration of Magnesium is 1s2 2s2 2p6 3s2 (noble-gas shorthand: [Ne] 3s2). Its electrons are arranged in shells of 2, 8, 2, with 2 in the outermost shell.
- Is Magnesium a metal or a nonmetal?
- Magnesium is a metal: specifically an alkaline earth metal.
- What group and period is Magnesium in?
- Magnesium is in group 2 and period 3 of the periodic table.
- Is Magnesium a solid, liquid, or gas?
- At room temperature, Magnesium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.