Ionic, Covalent & Metallic Bond Practice Questions

Complete Table 1 to show the type of bonding in each substance.

Table 1

Substance	Elements present	Type of bonding
Potassium iodide, $\mathrm{KI}$	potassium and iodine
Zinc, $\mathrm{Zn}$	zinc only
Sulfur dioxide, $\mathrm{SO_2}$	sulfur and oxygen

Name the particles that are attracted to each other in ionic bonding.

Strontium is in Group 2.

Give the charge on a strontium ion.

Sulfur is in Group 6.

Give the charge on a sulfide ion.

A bromide ion has a charge of $1-$.

Explain why, in terms of electrons.

Name the type of bonding in brass.

Describe the structure and bonding in a metal such as zinc.

Give the charge on a calcium ion and the charge on a chloride ion.

Draw a dot and cross diagram to show what happens when atoms of calcium and chlorine react to produce calcium chloride.

Calcium chloride is a giant ionic lattice.

Explain what holds the ions together in the lattice.

Draw a dot and cross diagram for a molecule of ammonia, $\mathrm{NH_3}$.

Show the outer shell electrons only.

Draw a dot and cross diagram for a molecule of nitrogen, $\mathrm{N_2}$.

Show the outer shell electrons only.

Figure 1 shows the displayed formula of a molecule of ethanoic acid. Each line represents a single covalent bond.

Figure 1

Determine the molecular formula of ethanoic acid.

Molecular formula = ______________

Name the type of bonding in this compound.

Give one piece of evidence from Figure 2 that supports your answer to part (a).

Determine the empirical formula of the compound.

Use Figure 2.

Empirical formula = ______________

Give one limitation of using a two-dimensional diagram, such as Figure 2, to represent this structure.

State the type of structure of solid sodium chloride.

Describe the bonding in solid sodium chloride.

Give the letter of the diagram that represents a substance made of small molecules.

Name the type of bonding in the substance shown in diagram C.

Explain how diagram B shows that the substance has a giant covalent structure.

Compare the structure and bonding of the three substances in Table 2:

• potassium
• potassium chloride
• chlorine.

[6 marks]

The student draws a dot and cross diagram showing one magnesium ion and one oxide ion.

Give two limitations of using this dot and cross diagram to represent magnesium oxide.

The student then makes a ball and stick model of the giant structure of magnesium oxide.

Describe the limitations of using a ball and stick model to represent this structure.