GROUP 18 ELEMENTS
- Group 18 elements consists of helium, neon, argon, krypton, xenon and radon.
- These element known as noble gas; monoatomic.
- Group 18 elements in Periodic Table
PHYSICAL PROPERTIES
- Small atomic sizes.
- Colourless (at room temperature & pressure).
- Low melting point & boiling point.
- Low density.
- Insoluble in water.
- Cannot conduct electricity.
- Poor conductor.
GOING DOWN THE GROUP
- Small atomic sizes.
- Colourless (at room temperature & pressure).
- Low melting point & boiling point.
- Low density.
- Insoluble in water.
- Cannot conduct electricity.
- Poor conductor.
GOING DOWN THE GROUP
THE INERT PROPERTIES
- All noble gases are inert; chemically unreactive.
- All noble gases are inert; chemically unreactive.
APPLICATIONS