Question detail
Which of the following statements best explains why Group 1 elements are highly reactive?
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 one electron in their outer shell
- B. They have a full outer shell of electrons
- C. They are all metals
- D. They have high atomic masses
Answer
The correct option is They have one electron in their outer shell.
Explanation
The correct option is They have one electron in their outer shell. They have one electron in their outer shell is correct because it directly supports the approved learning objective to predict properties of Group 1 elements from trends down the group. 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 12a17f87 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Reactivity Trends
Students often think that all Group 1 elements react with water in the same way, without considering their increasing reactivity down the group.
Emphasize the trend that reactivity increases down Group 1, leading to more vigorous reactions with water for elements like potassium compared to lithium.
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