Question detail

What is the outer electron configuration of halogens?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

The periodic table

Question

A. 7 electrons
B. 1 electron
C. 2 electrons
D. 5 electrons

Answer

The correct option is 7 electrons.

Explanation

The correct option is 7 electrons. 7 electrons is correct because it directly supports the approved learning objective to describe halogens as non-metals that exist as molecules made of pairs of atoms. 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 1a658f2f keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.

Common mistake

Misunderstanding Halogen Structure

Students often describe halogens as single atoms rather than as molecules made of pairs of atoms.

Remember that halogens exist as diatomic molecules (e.g., Cl2, Br2, I2) and always refer to them as pairs of atoms.

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