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Which of the following is an alkali metal?

A. Lithium (Li)
B. Boron (B)
C. Calcium (Ca)
D. Krypton (Kr)

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Final answer:

Lithium (Li) is the alkali metal among the options given.


Explanation:

Lithium (Li) is the alkali metal among the options provided. The alkali metals, including lithium, are highly reactive metals that react vigorously with water. They are part of Group 1 in the periodic table and also include sodium, potassium, rubidium, cesium, and francium.


Learn more about alkali metals here:

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