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Praxis II General Science

Category - Chemistry

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Of the group 2 alkaline-earth metals, which is the most reactive?

Beryllium
Magnesium
Calcium
Strontium
Barium

Explanation

Answer: E - Barium has the lowest ionization energy and can donate or accept electrons the most easily. As a result it is the most reactive (with the exception of radium, but radium was not included on the list due to its radioactivity).

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