Question

14
type the correct answer in each box.
complete the chemical formula for each ionic compound. consult the periodic table to help you answer the question
magnesium nitride: mg n
calcium chloride: cacl

Explanation:

Magnesium Nitride:

Step1: Determine ion charges

Magnesium (Mg) is in group 2, so it forms $Mg^{2+}$ ions. Nitrogen (N) is in group 15, so it forms $N^{3-}$ ions (since it gains 3 electrons to achieve octet).

Step2: Balance charges

To balance the charges, we need 3 $Mg^{2+}$ ions (total positive charge: $3\times2 = +6$) and 2 $N^{3-}$ ions (total negative charge: $2\times(-3) = -6$). So the formula is $Mg_3N_2$.

Calcium Chloride:

Step1: Determine ion charges

Calcium (Ca) is in group 2, so it forms $Ca^{2+}$ ions. Chlorine (Cl) is in group 17, so it forms $Cl^-$ ions (gains 1 electron).

Step2: Balance charges

To balance the $2+$ charge of Ca, we need 2 $Cl^-$ ions. So the formula is $CaCl_2$.

Answer:

• Magnesium Nitride: $\boldsymbol{Mg_3N_2}$
• Calcium Chloride: $\boldsymbol{CaCl_2}$