## Introductory Chemistry (5th Edition)

(a) Magnesium loses 2 electrons to obtain a stable configuration and form a $Mg^{2+}$ cation Mg to $Mg^{2+}$ + $2e^{-}$ (b) Barium loses 2 electrons to obtain a stable configuration and form a $Ba^{2+}$ cation Ba to $Ba^{2+}$ + $2e^{-}$ (c) Iodine atom acquires 1 electron to obtain a stable configuration and form a $I^{-}$ anion I + e- to $I^{-}$ (d) Aluminum loses 3 electrons to obtain a stable configuration and form a $Al^{3+}$ cation Al to $Al^{3+}$ + $3e^{-}$
(a) Magnesium loses 2 electrons to obtain a stable configuration and form a $Mg^{2+}$ cation Mg to $Mg^{2+}$ + $2e^{-}$ (b) Barium loses 2 electrons to obtain a stable configuration and form a $Ba^{2+}$ cation Ba to $Ba^{2+}$ + $2e^{-}$ (c) Iodine atom acquires 1 electron to obtain a stable configuration and form a $I^{-}$ anion I + e- to $I^{-}$ (d) Aluminum loses 3 electrons to obtain a stable configuration and form a $Al^{3+}$ cation Al to $Al^{3+}$ + $3e^{-}$