Elements that do not form positive ions in their chemical reaction are non-metals.
For more information on ions, see the study guide on ions.
The chemical properties of the compounds of metal and non-metal elements are also different:
Metal and non-metal elements have different physical properties:
The table shows some other differences in physical properties of metals and non-metals, when solid.
|Properties of a typical metal (when solid)||Properties of a typical non-metal (when solid)|
|Good conductor of electricity||Poor conductor of electricity|
|Good conductor of heat||Poor conductor of heat|
|High density||Low density|