Metals have high melting and boiling points compared to non-metals because they are good conductors of heat and electricity, while non-metals are poor conductors of heat and electricity. Metals are solids at room temperature except mercury which is the only metal that is a liquid.
Metals are strong, while non-metals are brittle. Metals produce sound when they are struck, while non-metals do not. Metals are lustrous and shine, while non-metals are dull. Metals have high density compared to non-metals.
Metals such as aluminum, gold and silver are malleable and can be beaten into sheets. Metals such as aluminum and copper are ductile, and they can be pulled into wires. Metals form basic oxides such as magnesium oxide while non-metals form acidic oxides such as sulphur dioxide, sulphur trioxide and carbon dioxide.