Question detail
What did Mendeleev do to account for undiscovered elements in his 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. He left gaps for them
- B. He removed existing elements
- C. He rearranged all elements by atomic weight
- D. He grouped all elements together
Answer
The correct option is He left gaps for them.
Explanation
The correct option is He left gaps for them. He left gaps for them is correct because it directly supports the approved learning objective to describe how Mendeleev left gaps for undiscovered elements. 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 6534f83a keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Mendeleev's Gaps
Students often think Mendeleev left gaps randomly without scientific reasoning.
Emphasize that Mendeleev left gaps based on the properties of elements and predicted their existence, which was a systematic approach to the arrangement of the periodic table.
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