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Page 1

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Group 2
Trends down a group
More reactive with water
Hydroxides are more soluble
Carbonates are less soluble
More thermally stable

Trends across a period
Less reactive




Reaction Thermal Ease of Solubility of Solubility of Acid base
with stability decomposition hydroxides carbonates behaviour
water

Mg




More strongly alkaline
More Reactive…

Page 2

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Reactions of the elements in Group 2
The metals react with water to give the metal hydroxide and hydrogen
metal + water metal hydroxide + hydrogen
M (s) + 2H20 M (OH)2 (S) + H2 (g)

As is typical for metals, the reactions become more vigorous as you go down…

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