Group 1

• Properties:

  -very reactive - one electron in their outer shell which can be lost to get a full outer shell

  -silvery solids - stored in paraffin

  -Metal + water -> metal hydroxide + hydrogen
• Lithium- effervescence

  Sodium- effervescence and forms a ball

  Potassium- effervescence and burns with a lilac flame
• Reactivity increases as:

  -more outer electron shells

  -outermost electron is further away from the positive nucleus

  -outermost electron experiences less attraction from the positive nucleus

  -electron is lost more easily
• Group 1:

  -all elements in this group are metals, therefore the bonding is metallic