Question detail
Which of the following statements is true about elements in the same group of the periodic table?
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-shell electrons.
- B. They have the same atomic mass.
- C. They have the same number of protons.
- D. They have different electron arrangements.
Answer
The correct option is They have the same number of outer-shell electrons..
Explanation
The correct option is They have the same number of outer-shell electrons.. They have the same number of outer-shell electrons. is correct because it directly supports the approved learning objective to explain how outer-shell electrons give elements in the same group similar chemical properties. This is tested in the subtopic The periodic table 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 The periodic table precisely. Repair marker fb090b27 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Outer-Shell Electrons
Students often think that all elements in the same group have identical properties, rather than similar properties due to having the same number of outer-shell electrons.
Emphasize that while elements in the same group have the same number of outer-shell electrons, this leads to similar but not identical chemical properties. Provide examples of elements within a group to illustrate this point.
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