National 5 Chemistry - Unit 1 - Bonding and Properties

Covalent bonds are formed when

• positive and negative ions are attracted to each other

• positive metal ions are attracted to delocalised electrons

• positive nuclei are attracted to a shared pair of electrons

• none of the above

A small group of atoms bonded covalently is called...

• a metallic lattice

• an ionic lattice

• covalent network

• covalent molecule

Diamond is an example of a

• covalent molecule

• covalent network

• metallic lattice

• ionic lattice

What type of elements form Covalent Bonds?

• Metals only

• Non-metals only

• Metals and non-metals

What type of elements form ionic bonds?

• metals

• non-metals

• non-metals and metals

Ionic bonds are the attraction between

• positive nuclei and shared electrons

• positive metal ions and delocalised electrons

• positive and negative ions

Ionic substances have which type of structure?

• covalent molecular

• covalent network

• ionic lattice

• metallic lattice

Which structure will have low melting and boiling points?

• metallic lattice

• ionic lattice

• covalent molecular

• covalent network

Do covalent compounds conduct electricity?

• Yes

• No

Which line in the table shows the properties of a covalent network compound?

• A

• B

• C

• D