Question

The following compounds contain ions that are required in small amounts by the body. Write the formula for each.

a. Calcium chloride

b. Nickel (III) iodide

c. Manganese (II) oxide

d. Zinc nitride

Short answer

a. The formula of the compound is ${\mathrm{CaCl}}_2$.

b. The formula of the compound is ${\mathrm{NiI}}_3$.

c. The formula of the compound is ${\mathrm{MnO}}_2$.

d. The formula of the compound is${\mathrm{Zn}}_3{\mathrm{N}}_2$.

Step-by-step solution

Part (a) Given information

To give the formula of the compound Calcium chloride.

Part (a) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal.

The naming of a binary ionic compound can be done using the following rules:

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Calcium chloride. It is made up of calcium$\left({\mathrm{Ca}}^{2+}\right)$ and chloride$\left({\mathrm{Cl}}^{-}\right)$ ions.

Thus, the formula of the given ionic compound is${\mathrm{CaCl}}_2$.

Part (b) Given information

To write the formula of the compound Nickel (III) iodide.

Part (b) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal.

The naming of a binary ionic compound can be done using the following rules:

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Nickel (III) iodide. It is made up of Nickel $\left({\mathrm{Ni}}^{3+}\right)$and iodide$\left({\mathrm{I}}^{-}\right)$ ions.

Thus, the formula of the given ionic compound is ${\mathrm{NiI}}_3$.

Part (c) Given information

To write the formula of the compound Manganese (II) oxide.

Part (c) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal.

The naming of a binary ionic compound can be done using the following rules:

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is manganese (II) oxide. It is composed of manganese$\left({\mathrm{Mn}}^{4+}\right)$and oxide$\left({\mathrm{O}}^{2-}\right)$ions.

Thus, the formula of the given ionic compound is${\mathrm{MnO}}_2$.

Part (d) Given information

To write the formula of the compound Zinc nitride.

Part (d) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal.

The naming of a binary ionic compound can be done using the following rules:

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Zinc nitride. It is composed of zinc$\left({\mathrm{Zn}}^{2+}\right)$ and nitride$\left({\mathrm{N}}^{3-}\right)$ ions.

Thus, the formula of the given ionic compound is${\mathrm{Zn}}_3{\mathrm{N}}_2$.