Question detail
What trend is observed in the reactivity of Group 2 metals as you move down the group?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Group 2, the alkaline earth metals
Question
- A. Reactivity decreases down the group.
- B. Reactivity remains the same down the group.
- C. Reactivity increases down the group.
- D. Reactivity fluctuates without a clear pattern.
Answer
Reactivity increases down the group.
Explanation
The cause is the increasing atomic radius and decreasing ionization energy down the group. The mechanism involves the outer electrons being further from the nucleus, which makes them easier to remove. The effect is that Group 2 metals become more reactive as they can lose their outer electrons more readily. Consequently, this trend is important for understanding their reactions with water and acids.
Common mistake
Misunderstanding Barium Sulfate's Safety
Students often believe that barium sulfate is safe to use in medicine because it is a barium compound, overlooking its toxicity.
Barium sulfate is used in medicine because it is insoluble in water, preventing it from being absorbed into the bloodstream, thus minimizing toxicity while allowing it to be used as a contrast agent in medical imaging.
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