Why beryllium and magnesium from ions with the same charge?

Beryllium (Be) and magnesium (Mg) both belong to Group 2 of the Periodic Table, where they have two valence electrons. When they form ions, they each lose these two electrons, resulting in Be²⁺ and Mg²⁺ ions, which have the same charge of +2. The similarity in their ionic charge arises from their position in the periodic table and their electron configurations. Thus, despite differences in size and other properties, both elements produce ions with the same positive charge.