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Question

Give an example of a gaseous non-metal.


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Solution

Non-metals

  1. Non-metals are present on the upper right side of the periodic table. (Exception: Hydrogen is a non-metal)

2. Non-metals possess higher ionisation energies, electron affinities, and electronegativity.

3. Non-metals have high electronegativity, therefore, they tend to attract electrons in a chemical reaction to form an acidic compound.

The physical state of non-metals:

Non-metal exists in all three forms of matter, but mostly they exist in a gaseous state.

Some examples of non-metals are oxygen, nitrogen, sulphur, chlorine etc.

Non-metalState at Room TemperatureSymbol
HydrogenGasH
NitrogenGasN
OxygenGasO
FluorineGasF
ChlorineGasCl
BromineLiquidBr
IodineSolidI
CarbonSolidC
SulphurSolidS
PhosphorousSolidP
SiliconSolidSi

Figure: Table representing a list of non-metals with their physical states.

Most of the non-metals are in the gaseous state at room temperature.


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