Ionic, Covalent & Metallic Bond (AQA GCSE Combined Science: Trilogy: Chemistry): Exam Questions

Exam code: 8464

2 hours17 questions
1a
1 mark

This question is about lithium and chlorine.

Which group of the periodic table is chlorine in?

1b
4 marks

Lithium reacts with chlorine to produce lithium chloride.

lithium      +      chlorine  lithium chloride

The diagram in Figure 1 shows how the reaction happens.

Only the outer electrons are shown.

Figure 1 

MzXj7JO2_lithium-chloride-electron-transfer

Use the words in the boxes to complete the sentences:

gaining sharing positive Group1 negative

covalent losing Group0 electrostatic neutral

A lithium atom becomes an ion by ____________________  one electron. 

A lithium ion has a _____________________ charge. 

The lithium ion now has the electronic structure of a _____________________ element.

The ions in lithium chloride are held together by strong ____________________ forces.

1c
2 marks

Why do lithium and chlorine react in this way?

1d
1 mark

A chlorine atom has 17 electrons.

What is the electronic configuration of the chloride ion formed?

Tick (one box.

 2

 

 2,8

 

2,8,8

 

2a
1 mark

This question is about the structure and bonding in methane. 

A molecule of methane is shown in Figure 1. 

Figure 1 

GqxcNKPk_methane

Give the formula of this methane molecule. 

2b
1 mark

What type of bonding is found in methane? 

Tick (one box. 

 Ionic

 

 Covalent

 

Metallic

 

2c
2 marks

The bonding in methane can be shown using a dot and cross diagram. 

Carbon has four electrons in its outer shell, and hydrogen has one. 

Complete the dot and cross diagram for methane.

methane-dot-and-cross-diagram
2d
2 marks

Give two limitations of using a dot and cross diagram to represent covalent compounds.

Tick two boxes.

 They are 3D

 

 They do not show the relative sizes of the atoms

 

 They are 2D

 

 They show the electrons between atoms

 

3a
4 marks

This question is about bonding and structure in different substances. 

Draw one line from each substance to the type of bonding it has. 

bonding-match-up-
3b
1 mark

The structure of copper is shown in Figure 1. 

Which particle is represented by 'X'?

Figure 1 

metallic-structure
3c
2 marks

When magnesium reacts with chlorine to form magnesium chloride, magnesium forms the ion Mg2+.

Explain how. 

3d
2 marks

Which two substances from part a) have intermolecular forces between particles?

3e
1 mark

Complete the dot and cross diagram to show how electrons are shared in water.

Some of them have been done for you. 

water-dot-and-cross-diagram
4a
4 marks

Potassium can be reacted with bromine to produce potassium bromide.

            potassium     +     bromine     →     potassium bromide

The diagram in Figure 1 shows how this happens.

Only the outer electrons are shown.

The dots (●) and crosses (×) are used to represent electrons.

Figure 1

potassium-brominde-bonding

Using the diagram in Figure 1, describe what happens when potassium and bromine react to form potassium bromide.

4b
1 mark

What is the empirical formula of potassium bromide?

Use Figure 1 to help you.

 KBr

 

 K2Br

 

KBr2

 

4c
3 marks

An atom of potassium is represented as straight K presubscript 19 presuperscript 39.

Give the number of protons, neutrons and electrons in this atom of iron.

   Number of protons    _______________________

   Number of neutrons  _______________________

   Number of electrons  _______________________

4d
2 marks

Potassium is a metal located in Group 1 of the periodic table. 

Which two statements are correct about potassium?

Tick () two boxes. 

 It has a giant structure 

 

 It has strong covalent bonds 

 

 It has free moving ions 

 

 It has delocalised electrons

 

1a
1 mark

The arrangement of electrons in a sodium atom can be written as 2, 8, 1 which represents the atom's electronic structure.

Write the electronic structure for an atom of potassium.

1b
2 marks

The electronic structure of a sodium atom can also be shown using an electron shell diagram as shown in Figure 1.

Figure 1 

tgnYWZQT_sodium-electron-configuration-aqa-sq-21-m-1b

Repeat the drawing for a chlorine atom to show its electronic structure.

1c
3 marks

Draw a similar diagram to show the electronic structure of the particles in sodium chloride, indicating how the compound was formed.

2a
2 marks

The ionic lattice structure of sodium chloride is shown in the diagram.

ionic-lattice

Complete the table. 

Name of ion

Charge

 

 

 

 

2b
3 marks

Using the diagram in (a) to help you, describe the nature of the chemical bonding in ionic structures.

2c
2 marks

Suggest two assumptions that the diagram in part (a) makes.

2d
1 mark

Calcium metal combusts in oxygen and produces calcium oxide, CaO.

Balance the equation for the reaction. 

___Ca(s) + ___O2(g) → ___CaO(s)

2e
2 marks

Describe what happens when a calcium atom becomes ionised.

3a
1 mark

Magnesium iodide is an ionic compound containing magnesium ions (Mg2+ ) and iodide ions (I).

State the chemical formula of magnesium iodide.

3b
5 marks

Describe, in terms of electrons and bonding, the reaction between magnesium and iodine.

4
1 mark

Ammonia, NH3, is a small covalent molecule.

How many non-bonding, outer-shell electrons are present in one molecule of ammonia?

  • 0

  • 2

  • 5

  • 6

5a
2 marks

Iodine and bromine are both halogens. The bonding in iodine is similar to the bonding in chlorine.

Suggest two reasons why they bond in similar ways.

5b
2 marks

Complete the diagram below to show the bonding arrangement in a molecule of iodine.

Show the outer shell electrons only.

iodine-electron-configuration-blank
5c
2 marks

Explain why liquid iodine is unable to conduct electricity.

6a
4 marks

Zinc is a typical metal.

Describe the structure and bonding in zinc.

6b
1 mark

Explain how zinc is able to conduct electricity?

6c
2 marks

The surface of some metals, such as iron and copper, corrode when exposed to the air which reduces their electrical conductivity. 

Suggest why their conductivity is reduced.

6d
2 marks

Magnesium ribbon is used in many school laboratories for carrying out reactions involving metals and acids. It can be cut and folded easily. 

Explain why metals can be bent and shaped.

7
1 mark

Elements can bond together in many different ways, by sharing, gaining or losing electrons. In some of the resulting structures, strong electrostatic forces of attraction occur as a result of the type of bonding.

Which of the following examples does not involve strong electrostatic forces of attraction?

  • Bonding between sodium ions and chloride ions

  • Bonding in calcium

  • Bonding between carbon and hydrogen atoms

  • Bonding in the alloy of gold and copper

8a
4 marks

This question is about covalent bonding.

Write down four differences between ionic compounds and simple covalent compounds.

8b
5 marks

Describe the bonding in a molecule of ammonia, NH3.

1a
4 marks

This question is about sodium oxide.

Describe the structure and bonding in sodium oxide. 

1b
1 mark

Sodium is in Group 1 of the periodic table and oxygen in Group 6. 

What is the formula of sodium oxide?

1c
3 marks

Draw dot and cross diagrams to represent the three ions formed by sodium oxide. 

1d
4 marks

Figure 1 shows two other way of representing ionic compounds.

aqa-gcse-2-1h-tq-1d-ionic-compound-models

Compare the advantages and limitations of each model.

2a
3 marks

This question is about chemical bonds.

Aluminium and chlorine react to form aluminium chloride. 

Write the balanced symbol equation for the reaction.

Include state symbols.

2b
3 marks

Describe, in terms of electron arrangement, the type of bonding in a molecule of chlorine.

2c
5 marks

Describe, in terms of electron arrangement, the type of bonding in the compound aluminium chloride.

3a
1 mark

This question is about covalent bonding.

What is a covalent bond?

3b
1 mark

Complete the dot and cross diagram to show the bonding in propane. 

aqa-gcse-2-1h-tq-3b-propane-dot-and-cross-diagram
3c
2 marks

Explain why propane cannot conduct electricity.

3d
2 marks

Give two limitations of the dot and cross diagram in part (b).

4a
5 marks

This question is about the properties of metals. 

Copper is a typical metal.

Explain how the particles in copper are held together and why the metal is malleable.

You may use a diagram in your answer. 

4b
4 marks

Metals are good conductors of electricity.

Electrical conductivity increases across Period 3, from sodium to aluminium.

Explain why. 

5a
2 marks

This question is about structure and bonding.

Complete the dot and cross diagram to show the covalent bonding in an oxygen molecule, O2.

Show only the electrons in the outer shell.

aqa-gcse-2-1h-tq-5a-oxygen-dot-and-cross-diagram
5b
4 marks

Oxygen can react with magnesium to form magnesium oxide.

Describe the differences in the bonding and structure of magnesium oxide and oxygen. 

5c
3 marks

The melting points of magnesium oxide and sodium chloride are shown in Table 1. 

Table 1 

Substance

Melting point (oC)

 Sodium chloride

801

 Magnesium oxide

2852

Explain why magnesium oxide has a higher melting point than sodium chloride.