Question detail
Why do Group 1 elements have similar chemical properties?
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. They have the same number of outer electrons
- B. They have the same number of protons
- C. They have the same atomic mass
- D. They are all metals
Answer
The correct option is They have the same number of outer electrons.
Explanation
The correct option is They have the same number of outer electrons. They have the same number of outer electrons 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 c47d901e 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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