## Introductory Chemistry (5th Edition)

(a) Sodium loses an electron to to obtain a stable configuration and form a $Na^{+}$ cation Na to $Na^{+}$ + $1e^{-}$ (b) Oxygen atom acquires 2 electrons to obtain a stable configuration and form a $O^{2-}$ anion O + $2e^{-}$ to $O^{2-}$ (c) Calcium loses 2 electrons to obtain a stable configuration and form a $Ca^{2+}$ cation Ca to $Ca^{2+}$ + $2e^{-}$ (d) Chlorine obtains a 1 electron to obtain a stable configuration and form a $Cl^{-}$ anion Cl + $1e^{-}$ to $Cl^{-}$
(a) Sodium loses an electron to to obtain a stable configuration and form a $Na^{+}$ cation Na to $Na^{+}$ + $1e^{-}$ (b) Oxygen atom acquires 2 electrons to obtain a stable configuration and form a $O^{2-}$ anion O + $2e^{-}$ to $O^{2-}$ (c) Calcium loses 2 electrons to obtain a stable configuration and form a $Ca^{2+}$ cation Ca to $Ca^{2+}$ + $2e^{-}$ (d) Chlorine obtains a 1 electron to obtain a stable configuration and form a $Cl^{-}$ anion Cl + $1e^{-}$ to $Cl^{-}$