Alkali Metals are some of the most reactive metals and are found in group 1. They consist of:
- Lithium (3)
- Sodium (11)
- Potassium (19)
- Rubidium (37)
- Caesium (55)
- Francium (87)
As you go down the table they grow more reactive. This is because a the lone electron on the outer shell is further away it requires less energy to escape the atom.
Alkali metals typically react with water and oxygen. When they react with water they produce hydrogen and a metal hydroxide.
In addition, electron shielding occurs. This means that the electrons near the middle repulse the ones on the edge, causing it to be more easily lost.
Lastly, all Group 1 metals have one electron on their outer shell. They therefore make ions with a +1 charge such as Li+.
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