Elements in Group 18

4.3

Elements in Group 18

Also known as inert gases or noble gases.
Can be found at the far-right column of the Periodic Table.

This image shows a simplified periodic table of elements. The table is highlighted in light blue, and only the noble gases are filled in. These noble gases, located in the far-right column, include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson (Og). The rest of the table is empty with outlined boxes.

Physical Properties

Insoluble in water.
Does not conduct electricity.
Does not conduct heat.
The boiling and melting point is increasing down the group.
The van der Waals forces are increasing when the size of the atoms increases.

Chemical Properties

Does not react with other elements.
Exists as a monatomic (single atom).
Inert gases are non-reactive because the valence shell is full.
For example, helium has a stable duplet electron arrangement, because the number of valence electrons is two.
The other elements in Group 18 have a stable octet electron arrangement because the number of valence electrons is eight.
Noble gas did not accept or donate electrons as it is already stable.

Uses of Group 18 Elements
Element	Uses
Helium	Used to fill weather balloons Used in the oxygen tanks of divers
Neon	Used in advertising board lights
Argon	• Used to fill in electric bulbs Used to provide an inert atmosphere for welding in high temperature
Krypton	Used in flashlight of cameras Used in lasers for eye retina treatment
Xenon	Used in lighthouse lamps Used for anesthesia
Radon	Used to treat cancer

Elements in Group 18

4.3

Elements in Group 18

Also known as inert gases or noble gases.
Can be found at the far-right column of the Periodic Table.

Physical Properties

Insoluble in water.
Does not conduct electricity.
Does not conduct heat.
The boiling and melting point is increasing down the group.
The van der Waals forces are increasing when the size of the atoms increases.

Chemical Properties

Does not react with other elements.
Exists as a monatomic (single atom).
Inert gases are non-reactive because the valence shell is full.
For example, helium has a stable duplet electron arrangement, because the number of valence electrons is two.
The other elements in Group 18 have a stable octet electron arrangement because the number of valence electrons is eight.
Noble gas did not accept or donate electrons as it is already stable.

Uses of Group 18 Elements
Element	Uses
Helium	Used to fill weather balloons Used in the oxygen tanks of divers
Neon	Used in advertising board lights
Argon	• Used to fill in electric bulbs Used to provide an inert atmosphere for welding in high temperature
Krypton	Used in flashlight of cameras Used in lasers for eye retina treatment
Xenon	Used in lighthouse lamps Used for anesthesia
Radon	Used to treat cancer

Elements in Group 18

Elements in Group 18

Chapter : Periodic Table of Elements

Topic : Elements in Group 18

Related notes