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What is physical property?
A physical property is a property of matter that can be observed and measured without changing the sample's chemical identity.
(a). Physical state:
Solid iron coils
All metals are solids at ambient temperature except for Mercury and Gallium.
(b). Lustre:
Shiny gold metal
Metals have a high lustre (named metallic lustre).
(c). Hardness:
Hard iron metal rods
The majority of metals are tough and durable (exceptions: Sodium and Potassium can be cut with a knife)
(d). Melting point and Boiling point:
Highly melted metal
Metals usually have high melting and boiling points, and they evaporate only at high temperatures. (exceptions: Gallium, Mercury, Sodium and Potassium).
(e). Density:
High density metal used in train wheels
Metals possess high density (exceptions: Sodium and Potassium are less dense than water).
(f). Ductility:
Metal wire used in the bridge protection wall
Generally, metals are ductile. They are capable of being drawn into thin wires without breaking.
(g). Malleability:
Metal sheet used for roofing
Metals are usually malleable, i.e., metals can be beaten into thin sheets without cracking (except Zinc and Mercury).
(h). Conduction of heat and electricity:
Metal wire used in electricity
Metals are the best conductors of heat and electricity; silver and copper are particularly good in this (exception: Tungsten).
(i). Solubility:
Metal under the water does not dissolve
Metals do not usually dissolve in liquid solvents.
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