Question detail
What determines the reactivity of Group 1 alkali metals?
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. The number of electrons in the outer shell
- B. The number of protons in the nucleus
- C. The atomic mass of the element
- D. The number of neutrons in the nucleus
Answer
The correct option is The number of electrons in the outer shell.
Explanation
The correct option is The number of electrons in the outer shell. The number of electrons in the outer shell is correct because it directly supports the approved learning objective to explain how reactions of elements relate to electron arrangement and atomic number. This is tested in the subtopic Metals and non-metals 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 Metals and non-metals precisely. Repair marker 9c3d25ac keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Electron Arrangement
Students often confuse the number of outer electrons with the atomic number when explaining how reactions of elements relate to electron arrangement.
Emphasize that the atomic number indicates the number of protons and thus the total number of electrons in a neutral atom, while the outer electron count specifically determines the element's reactivity.
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