Question detail
What happens to the ability of halogens to displace other halides as you move down Group 7, and why?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
The periodic table
Question
What happens to the ability of halogens to displace other halides as you move down Group 7, and why?
Answer
As you move down Group 7, the ability of halogens to displace other halides decreases. This is because the larger atomic radius and increased shielding effect reduce the attraction of the outer electrons to the nucleus, making it harder for the halogens to gain an electron and react.
Explanation
This answer effectively explains the trend in displacement reactions among halogens, linking it to atomic structure concepts. The question assesses the student's application of knowledge regarding reactivity trends in Group 7.
Common mistake
Reactivity Misunderstanding
Students often think that reactivity increases down Group 7 instead of decreases.
Focus on the concept that as you move down Group 7, the outer electrons are further from the nucleus, making it harder for the atom to attract additional electrons, thus decreasing reactivity.
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