Question detail
What is the reason for the increase in reactivity down Group 1 elements?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The periodic table
Question
- A. Increased distance of outer electron from nucleus
- B. Increased atomic mass
- C. Decreased distance of outer electron from nucleus
- D. Increased number of protons
Answer
The correct option is Increased distance of outer electron from nucleus.
Explanation
The correct option is Increased distance of outer electron from nucleus. Increased distance of outer electron from nucleus is correct because it directly supports the approved learning objective to describe and explain why reactivity increases down Group 1. This is tested in the subtopic Group 1 within The periodic table, so the reasoning must stay within AQA GCSE Chemistry 8462 Unit 4.1. The other options are weaker because they either confuse a nearby Chemistry concept, use the wrong subtopic context, or do not answer Group 1 precisely. Repair marker 6edde07f keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Reactivity Misunderstanding
Students often believe that reactivity increases down Group 1 because the elements become heavier.
Reactivity increases down Group 1 due to the increasing distance of the outer electron from the nucleus, which makes it easier to lose that electron.
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