Question detail
Which statement best describes halogens?
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 exist as molecules made of pairs of atoms.
- B. They are all metals.
- C. They exist as single atoms.
- D. They have a full outer shell of electrons.
Answer
The correct option is They exist as molecules made of pairs of atoms..
Explanation
The correct option is They exist as molecules made of pairs of atoms.. They exist as molecules made of pairs of atoms. is correct because it directly supports the approved learning objective to explain that halogens have seven electrons in their outer shell. This is tested in the subtopic Group 7 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 7 precisely. Repair marker fee59af3 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Halogen Electron Configuration
Students often state that halogens have eight electrons in their outer shell instead of seven.
Remember that halogens have seven electrons in their outer shell, which is why they are reactive and tend to gain one electron to achieve a full outer shell.
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