National 5 Chemistry - Bonding

Which structure will have low melting and boiling points?

• metallic lattice

• ionic lattice

• covalent molecular

• covalent network

Why do covalent molecular substances have low melting and boiling points?

• The covalent bonds need to be broken

• The weak inter-molecular forces need to be broken

Ionic bonds are the attraction between

• positive nuclei and shared electrons

• positive metal ions and delocalised electrons

• positive and negative ions

Non-metal form (blank) ions.

• positive

• negative

Which term can be used to describe the shape of phosphorous hydride?

• Trigonal pyrimidal

• Tetrahedral

• Linear

• V-Shaped

Ionic substances have which type of structure?

• covalent molecular

• covalent network

• ionic lattice

• metallic lattice

Are Ionic substances soluble in water?

• Yes

• No

What type of elements form Covalent Bonds?

• Metals only

• Non-metals only

• Metals and non-metals

Why can metals conduct electricity?

• They have positive and negative ions

• The have delocalsied ions

• They can't conduct electricity

• They have delocalised electrons.

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

• A

• B

• C

• D