Front

Why do giant covalent structures have high melting points?

Back

Giant covalent structures have high melting points because there are lots of strong covalent bonds between the atoms.

Front

Why is diamond hard?

Back

Each carbon atom is bonded to 4 other carbon atoms.

Front

What type of structure is made of many non-metal atoms joined by covalent bonds?

Back

Giant covalent structure

Front

Graphite, diamond, and graphene are all made up of which element?

Back

Carbon

Front

Diamond cannot conduct electricity because...

Back

It has no free electrons.

Front

Why is graphite a good lubricant?

Back

It has layers which can slide over each other, due to the weak forces between the layers.

Front

What are the properties of silicon dioxide properties?

Back

High melting and boiling point, hard, cannot conduct electricity

Front

Does carbon dioxide have a giant covalent structure?

Back

No it is a small covalent molecule.

Front

How many bonds does each carbon form in graphite?

Back

3 covalent bonds per atom

Front

Why can graphite conduct electircity?

Back

Delocalised electrons carry the charge through the structure.