Question

Q-2 Explain the difference on the basis of properties

(2) Physical properties of metals and non metal physical properties.​

Answer 1

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Physical properties of metal :

• State : most of the metals are found solid state at normal temperature except mercury (Hg)Which is found in liquid state at normal temperature.

• Colour : Mostly metals are grey in colour.

• Lustre : Most of the metals are lustrous s such as gold , silver , copper , aluminium.

• Density : generally metals have high density.

• Melting point : Melting points of metals are generally high except galium and caesium which have low melting points. They melt on the palm of the hand.

• Malleability : Metals can be converted into thin sheets by hammering, thus they are malleable.

• . Ductility : When metals are stretched , convert into wires. This property of metals is called ductility.

Physical properties of Non-metals :

• colour: Non-metals have variety of colours such as sulphur (yellow) chlorine gas (greenish yellow), phosphrous (red, white).

• Lustre : Non-metals are non lustrous .Iodine is an exception, it is a lustrous non-metal.

• Hardness: They are soft . Diamond is exception , it is the hardest nonmetals found on earth.

• Sonorous : They do not produce sound.

• Density : They have less density.

• Melting point : The have low melting point except diamond and graphite .Diamond and graphite (allotropes of carbon) have very high melting point.

• heat and electric conductivity : They are bad conductors of heat and electricity except graphite, which is a good conductor of electricity.

• Brittle : They break into pieces when beaten with a hammer, thus they are brittle.

Answer 2

Answer:

Explanation:

Themosetting plastics and themoplastics