Magnesium (Mg), element 12 – Learn Acer periodic table

Magnesium

Alkaline earth metal, atomic number 12.

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.

Facts

Symbol Mg. Atomic mass 24.305 u. Group 2, period 3. Electron configuration [Ne] 3s2. Electrons per shell 2, 8, 2. State at room temperature: Solid. Melting point 649.9 °C, boiling point 1089.8 °C. Discovered by Joseph Black.

Element data from Wikipedia, CC BY-SA 3.0.