magnesium aluminum potassium
magnesium (Mg) loses 2 of its valence electrons to become Mg^2+ ; Mg 1s^2 2s^2 2p^63s^2 Mg^2+ 1s^2 2s^2 2p^6 aluminum (Al) loses 3 of its valence electrons to become Al^3+ ; Al 1s^2 2s^2 2p^63s^2 3p^1 Al^3+ 1s^2 2s^2 2p^6 potassium (K) loses 1 of its valence electrons to become K^+ ; K 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 K^+ 1s^2 2s^2 2p^6 3s^2 3p^6 Hope this helps;-D
