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 — that's 2 in the outermost shell.
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
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.