State any five physical properties of metals and five physical properties of non-metals.

Metals

A metal is an element that easily forms positive ions known as cations and makes metallic bonds. The five physical properties of metals are:

1. Metals are malleable (can be hammered into thin sheets) and ductile (can be drawn into thin wires).
2. Metals are lustrous and can be polished to enhance their shine.
3. Metals are good conductors of heat and electricity.
4. Metals are tough and hard.
5. All metals, except mercury, are solids at room temperature.

Non-Metals

A non-metal is an element that gains electrons in a chemical reaction when it reacts with a metal. It forms an acid when combined with oxygen and hydrogen. The five physical properties of non-metals are:

1. Non-metals are not malleable or ductile. 
2. Non-metals, except graphite, are bad conductors of heat and electricity.
3. Non-metals are non-lustrous and cannot be polished (except iodine).
4. Non-metals at room temperature may be solids, liquids or gases.
5. Non-metals are brittle as they are neither tough nor strong.

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