Question detail
What was a key reason for the incompleteness of early periodic tables?
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 were based on limited experimental data.
- B. They did not consider the periodic trends of elements.
- C. They only included elements that were discovered in Europe.
- D. They were arranged without considering chemical reactivity.
Answer
The correct option is They were based on limited experimental data..
Explanation
The correct option is They were based on limited experimental data.. They were based on limited experimental data. is correct because it directly supports the approved learning objective to explain why early periodic tables were incomplete. This is tested in the subtopic Development of 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 Development of the periodic table precisely. Repair marker 86f4ab23 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Incomplete Early Tables
Students often state that early periodic tables were incomplete because they lacked certain elements without explaining the reason for the gaps.
Students should clarify that early periodic tables were incomplete because they did not account for the properties of elements that were not yet discovered, leading to gaps in the arrangement.
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