Why are group 2 elements called as alkaline earth metal?

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Solution

The alkaline earth family is the second most reactive group, and it's elements can't be found free in nature. They are called "alkaline" earth metals because they form "alkaline" solutions, hydroxides, when they react with water . "Earth" was the alchemists term for the oxides of alkaline earth metals.

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Which group of elements in the modern periodic table are referred as 'alkaline earth metals'?

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