Question

Give an example of a gaseous non-metal.

Answer 1

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-metal	State at Room Temperature	Symbol
Hydrogen	Gas	H
Nitrogen	Gas	N
Oxygen	Gas	O
Fluorine	Gas	F
Chlorine	Gas	Cl
Bromine	Liquid	Br
Iodine	Solid	I
Carbon	Solid	C
Sulphur	Solid	S
Phosphorous	Solid	P
Silicon	Solid	Si

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.