GCSE Chem U1 T3 Ionic Compounds and Metals

What is the structure of solid ionic compounds?

• A. Regular arrangement of positive ions in a sea of delocalised electrons

• B. Alternate positive and negative ions in a regular arrangement

• C. Attraction between delocalised electrons and positive ions

• D. Mixture of two or more elements with metallic properties

Which of the following is a property of ionic compounds?

• A. Low melting and boiling points

• B. Conducts electricity when solid

• C. Insoluble in water

• D. Cannot conduct electricity when molten or dissolved in water

Why do ionic compounds have high melting and boiling points?

• A. The ionic bonding is weak

• B. The ions are in a fixed lattice

• C. The ions can move and carry charge

• D. Substantial energy is required to break the strong ionic bonding

Why can't ionic compounds conduct electricity when solid?

• A. The ions are in a fixed lattice and cannot move or carry charge

• B. The ions can move and carry charge

• C. The delocalised electrons attract positive ions

• D. The ionic bonding is weak

Why can ionic compounds conduct electricity when molten or dissolved in water?

• A. The ions are in a fixed lattice and cannot move or carry charge

• B. The ions can move and carry charge

• C. The delocalised electrons attract positive ions

• D. The ionic bonding is weak

What is the definition of metallic bonding?

• A. Regular arrangement of positive ions in a sea of delocalised electrons

• B. Alternate positive and negative ions in a regular arrangement

• C. Attraction between delocalised electrons and positive ions

• D. Mixture of two or more elements with metallic properties

Which of the following is a property of metals?

• A. Low melting points and weak

• B. Cannot conduct electricity

• C. Malleable and ductile

• D. Insoluble in water

What is an alloy?

• A. Regular arrangement of positive ions in a sea of delocalised electrons

• B. Alternate positive and negative ions in a regular arrangement

• C. Attraction between delocalised electrons and positive ions

• D. Mixture of two or more elements with metallic properties

Why is pure gold seldom used in jewellery?

• A. It is too soft and would lose its shape

• B. It is too hard and brittle

• C. It is too expensive

• D. It is toxic

How is the purity of gold measured?

• A. In grams

• B. In carats

• C. In kilograms

• D. In ounces