Why is calcium the most chemically active alkaline earth metal?

Answer 1

Calcium is the most chemically active alkaline earth metal because it has a relatively low ionization energy compared to its group counterparts, which allows it to easily lose its two valence electrons. This property makes calcium more reactive, particularly with water and acids, leading to the formation of hydroxides and salts. Additionally, its larger atomic size compared to beryllium and magnesium results in a weaker attraction between the nucleus and the valence electrons, further enhancing its reactivity.