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

 

Group I(Alkali Metals)

Physical Properties

• Soft, can be cut easily using knife
• Good heat and electric conductors
• Low density
• Low melting and boiling point
• Silver grey in colour

Chemical Properties

• Lose 1 electron to form 1+ positive ions.
• React violently in contact with water
• React with oxygen to form basic oxide
• React with acid to form hydrogen
  

  

 

 

Atomic Structure of Group I

 

Reactivity of Group I Metals

 

 Reason explaining Reactivity of the Metals

As the amount of outer electron shell increases, the outermost electrons become further away from the nucleus. This caused the strong electrostatic force in between the electron and protons in the nucleus to become weak and make the outer electron to be easily lost. The easier it is to lose an electron, the more reactive the element is