Group One Metals

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   alkali      column      hydrogen      hydroxide      increases      least      lilac      most      oil      potassium      reactive      water   

The group one elements in the periodic table are known as the metals.
They include lithium, sodium and , which all react vigorously with air and .
The group one elements are placed in the vertical on the left hand side of the periodic table.
Lithium, sodium and potassium are very .
They must be stored under to keep air and water away from them.
Group one elements react vigorously with water to produce an alkaline metal hydroxide and gas.
In general:
Metal + water → metal hydroxide + hydrogen
The equation for the reaction of sodium with water:
Sodium + water → sodium + hydrogen
The reactivity of the alkali metals down the group. Lithium is the reactive and potassium is the reactive of the three.
Hydrogen ignites immediately during the reaction between potassium and water with the potassium producing a coloured flame.