Citation:
Magnesium is a chemical element with atomic number 12 and symbol Mg. It belongs to Group 2 (alkaline earth metals) in the periodic table and has two valence electrons.
The atomic number represents the number of protons found in an atom's nucleus.
This refers to how electrons are arranged within specific energy levels around an atom's nucleus.
Alkaline Earth Metals: This is a group/family on the periodic table that includes elements such as magnesium, calcium, and barium.