METALS AND NON METALS

METALS AND NON METALS

 

PROPERTIES

Metals

Exceptions

Non metals

Exceptions

Physical state

Hard crystalline solid.

Mercury is a liquid

Alkali metals- lithium, sodium and potassium are soft

Soft solid or gases.

Diamond is hardest substance.

Bromine is liquid.

Melting and boiling points

Usually, they have high melting and boiling points.

Sodium, potassium, gallium and caesium

They have low melting and boiling points 

Diamond – high

Malleability and ductility

They are malleable and ductile.

mercury, zinc and arsenic are non-malleable

Solid non-metals are brittle.

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Heat conductivity 

They are good conductors.

mercury and lead

They are bad conductors. 

Diamond

Electrical conductivity

They are good conductors

Bismuth and lead

They are bad conductors. 

Graphite

Lustrous

Metals are lustrous or shiny.

 

They are dull

Graphite and iodine

Density

They have high density

lithium

They have low density

Iodine

Sonority (phenomenon of producing a characteristic sound when a material is struck)

They are sonorous

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They are non-sonorous.

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