Group 0(Noble Gas)

Properties

• Monoatomic-exist as a single atom
• Unreactive because they have a full outer shell and is stable, so it does not need to bond with other elements

Uses

• Helium-Filling balloons
• Neon-Advertising signs
• Argon-Filling electric light bulb or filament lamp

Group VII(Halogen)

Physical Properties

• Poor conductors of heat and electricity
• Brittle
• Low melting and boiling points

Chemical Properties

• Gain 1 electron to form 1- negative ions
• React with metals to form ionic compounds
• React with non-metal to form covalent compounds



Displacement Reaction

• A reaction that take place in Halogens
• In a solution, the more reactive halogen will displace the less reactive haloge