1. Predict the charge each of the following atoms would have as an ion - if more than one charge is possible, include each different charge (use your cheat sheet).

a. Cl b. Na c. Mg d. O

e. Al f. Fe g. Cu h. Zn

The chlorine is present in group 17. It has seven valance electrons. It accept one electron to complete the octet and show - 1 charge and from anion.

Cl⁻

Sodium is present in group one. It alkali metal. It loses one valance electron and show + 1 charge. It form sodium cation.

Na⁺

Magnesium is present in group two. It loses its two valance electrons and show + 2 charge. It form magnesium cation.

Mg⁺²

Oxygen is present in group 16. It has six valance electrons. It require two electrons to complete the octet and show - 2 charge.

O⁻²

Aluminium is present in group 13. it has three valance electrons. It loses its three valance electrons and show + 3 oxidation state

Al⁺³ (most common)

others = Al⁺¹, Al⁺²

Iron is present on group eight.

Fe⁺², Fe⁺³ (most common)

others = Fe⁺⁴, Fe⁺⁵

Copper is present in group eleven.

Cu⁺¹ Cu⁺²

other = Cu⁺³

Zinc is present in group twelve. - 2, 0, + 1, + 2

Zn⁻², Zn⁺¹, Zn⁺²