Self assessment

·       Why does salt dissolve, and why does it appear to be cubic shaped?

·       Why does iodine sublime rather than melt and boil?

·       Why do metals form crystals and conduct electricity?

·       What happens when metals are beaten into shapes and pulled out into wire?

·       Why, if they are both made of carbon, is diamond so hard and graphite so soft?

·       If small molecules are gases at room temperature, why then is water a liquid at room

·       test your understanding 


Atomic structure
Atoms joining
Metal atoms joining