Question

Q.7.Solvethefollowingsubquetion
1) Explain the physical properties of metals with reference to following point
a) physical state b) conduction of heat c) conduction of electricity
d) Hardness
e) Melting & Boiling point​

Answer 1

Physical Properties of Metals

State: Metals are solids at room temperature with the exception of mercury, which is liquid at room temperature (Gallium is liquid on hot days).

Hardness: All metals are hard except sodium and potassium, which are soft and can be cut with a knife.

Conduction: Metals are good conductors because they have free electrons. Silver and copper are the two best conductors of heat and electricity. Lead is the poorest conductor of heat. Bismuth, mercury and iron are also poor conductors

Melting and Boiling Points: Metals have high melting and boiling points. Tungsten has the highest melting and boiling points whereas mercury has the lowest. Sodium and potassium also have low melting points.

Explanation:

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