Which of the following alkaline earth metals is most reactive? (2020)

Which of the following alkaline earth metals is most reactive? (2020)

Step 1: Understand what alkaline earth metals are. They are a group of elements in the second column of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.
Step 2: Know that reactivity in metals generally increases as you move down a group in the periodic table.
Step 3: Recognize that barium is lower in the alkaline earth metals group compared to others like beryllium and magnesium.
Step 4: Remember that larger atomic size means the outer electrons are further from the nucleus, making them easier to lose.
Step 5: Understand that lower ionization energy means it takes less energy to remove an electron from an atom.
Step 6: Conclude that barium, being larger and having lower ionization energy than the other alkaline earth metals, is the most reactive.

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