- The Group 1 metals is called the Alkali Metals.
- This is because they form oxides and hydroxides that dissolve in water to give alkaline solutions.
- As shown in the diagram on the right, elements in this group are lithium, sodium, potassium, rubidium, caesium and francium.
- They are the first element of a period, with one valence electron.
- This similarity (1 valence electron) makes them chemically behave in a similar manner.
- All alkali metals are very reactive. They must be stored in oil prevent reaction with oxygen or water vapour in air.