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M + H₂O → M(OH)₂ + H₂ ↑
A general chemical equation indicating the reaction of alkaline earth metals is given above. While going down the second group as Be → Mg → Ca → Sr → Ba, the gradation in this chemical property of the alkaline earth metals is seen. While going down the second group the reactivity of the alkaline earth metals goes on increasing and thereby the ease with which this reaction takes place also goes on increasing. Thus beryllium (Be) does not react with water. Magnesium (Mg) reacts with steam, while calcium (Ca), strontium (Sr) and barium (Ba) react with water at room temperature with increasing rates.

M + H₂O → M(OH)₂ + H₂ ↑

A general chemical equation indicating the reaction of alkaline earth metals is given above. While going down the second group as Be → Mg → Ca → Sr → Ba, the gradation in this chemical property of the alkaline earth metals is seen. While going down the second group the reactivity of the alkaline earth metals goes on increasing and thereby the ease with which this reaction takes place also goes on increasing. Thus beryllium (Be) does not react with water. Magnesium (Mg) reacts with steam, while calcium (Ca), strontium (Sr) and barium (Ba) react with water at room temperature with increasing rates.

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