1. Metals

2. Why are they so reactive?
Alkali metals
These are metals in group 1 of the periodic table.
They are never found free in nature as they are so reactive.
Their activity increases as you go down the group.
Why are they so reactive?

3. Properties of Alkali metals
Physical
Chemical
Soft.
Silver in colour.
Less dense than water.
Very reactive so stored under oil.
Form white oxides with oxygen.
Form hydroxides with water and also release hydrogen.

4. Uses of Alkali metals Lithium is used in batteries
Sodium is used in street lights.
Potassium in compound form is in fertilisers.

5. Metals and the periodic table
Symbols of some common metals
Cu =
Zn =
Al =
Fe =
Ag =
Au =
Copper
Zinc
Aluminium
Iron
Silver
Gold

6. Corrosion To prevent corrosion: Paint Oil Alloy
Galvanise i.e. coat in zinc (gates)
Chromium plate (taps)