Properties of ionic compounds

This question is about structure and bonding.

Why can metals be shaped?

Tick (✓) one box.

Different-sized atoms distort the structure.

Layers of atoms slide over each other.

Metallic bonds are weak.

Metals have low melting points.

Explain how metals conduct electricity.

You should answer in terms of electrons.

Figure 9 represents the structure of diamond and of sodium chloride.

Compare the structure and bonding of diamond with the structure and bonding of sodium chloride.

Ethene (C₂H₄) is a small molecule.

Calculate the relative formula mass (M_r) of ethene.

Relative atomic masses (A_r): C = 12 H = 1

Ethene molecules join together to form long-chain poly(ethene) molecules.

Explain why poly(ethene) has a higher melting point than ethene.

You should refer to the:

This question is about structure and bonding.

Why can metals be shaped?

Tick (✓) one box.

Different-sized atoms distort the structure.

Layers of atoms slide over each other.

Metallic bonds are weak.

Metals have low melting points.

Explain how metals conduct electricity.

You should answer in terms of electrons.

Figure 1 represents the structure of diamond and of sodium chloride.

Compare the structure and bonding of diamond with the structure and bonding of sodium chloride.

Ethene (C₂H₄) is a small molecule.

Calculate the relative formula mass (M_r) of ethene.

Relative atomic masses (A_r): C = 12 H = 1

Ethene molecules join together to form long-chain poly(ethene) molecules.

Explain why poly(ethene) has a higher melting point than ethene.

You should refer to the:

This question is about structure and bonding.

Figure 10 represents the electronic structure of an atom of an element.

Name the element in Figure 10.

Give one reason for your answer.

Use the periodic table.

Sodium reacts with fluorine to produce sodium fluoride.

Sodium fluoride is an ionic compound.

An atom of sodium and an atom of fluorine react to form a sodium ion and a fluoride ion.

Complete the dot and cross diagram for the sodium ion and the fluoride ion.

Show the charges on the ions.

Figure 11 represents the structure of sodium fluoride.

Describe how sodium ions and fluoride ions are held together in sodium fluoride.

What is a property of sodium fluoride?

Tick (✓) one box.

Conducts electricity when solid

High melting point

Low boiling point

This question is about structure and bonding.

Figure 1 represents the electronic structure of an atom of an element.

Name the element in Figure 1.

Give one reason for your answer.

Use the periodic table.

Sodium reacts with fluorine to produce sodium fluoride.

Sodium fluoride is an ionic compound.

An atom of sodium and an atom of fluorine react to form a sodium ion and a fluoride ion.

Complete the dot and cross diagram for the sodium ion and the fluoride ion.

Show the charges on the ions.

Figure 2 represents the structure of sodium fluoride.

Describe how sodium ions and fluoride ions are held together in sodium fluoride.

What is a property of sodium fluoride?

Tick (✓) one box.

Conducts electricity when solid

High melting point

Low boiling point

This question is about hydrogen chloride.

A hydrogen atom contains 1 electron and a chlorine atom contains 17 electrons.

Complete Figure 7 to show a dot and cross diagram for a hydrogen chloride molecule.

Show the outer electrons only.

Hydrogen gas (H₂) reacts with chlorine gas to produce hydrogen chloride.

Complete the balanced chemical equation for the reaction between hydrogen and chlorine.

Figure 8 shows the reaction profile diagram for the reaction between hydrogen and chlorine.

What do A and B represent on Figure 8 ?

How does the reaction profile diagram show that the reaction is exothermic?

Hydrogen chloride gas dissolves in water to form hydrochloric acid.

Hydrochloric acid contains hydrogen ions and chloride ions.

Explain why hydrogen chloride gas does not conduct electricity but hydrochloric acid is able to conduct electricity.

This question is about hydrogen chloride.

A hydrogen atom contains 1 electron and a chlorine atom contains 17 electrons.

Complete Figure 1 to show a dot and cross diagram for a hydrogen chloride molecule.

Show the outer electrons only.

Hydrogen gas (H₂) reacts with chlorine gas to produce hydrogen chloride.

Complete the balanced chemical equation for the reaction between hydrogen and chlorine.

Figure 2 shows the reaction profile diagram for the reaction between hydrogen and chlorine.

What do A and B represent on Figure 2 ?

How does the reaction profile diagram show that the reaction is exothermic?

Hydrogen chloride gas dissolves in water to form hydrochloric acid.

Hydrochloric acid contains hydrogen ions and chloride ions.

Explain why hydrogen chloride gas does not conduct electricity but hydrochloric acid is able to conduct electricity.