list Four physical properties of nonmetals
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➡non metals exist in all states
Solid - carbon , iodine, sulphur
Liquid - bromine
Gas - oxygen, hydrogen
➡they are soft
Exception- diamond an allotrope of carbon.
➡they are poor conductors of heat and electricity.
Exception- graphite an allotrope of carbon.
➡they have low melting point and boiling point.
Exception- diamond has high melting point and boiling point.
Graphite have high melting point
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