Question detail
How did the discovery of predicted elements support Mendeleev's 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. It validated his predictions and the placement of elements.
- B. It confirmed that atomic mass was the only factor in element arrangement.
- C. It showed that elements could be arranged randomly.
- D. It proved that chemical properties were irrelevant.
Answer
The correct option is It validated his predictions and the placement of elements..
Explanation
The correct option is It validated his predictions and the placement of elements.. It validated his predictions and the placement of elements. is correct because it directly supports the approved learning objective to explain how Mendeleev changed some element orders based on chemical properties. 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 844d9d47 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Mendeleev's Element Order
Students often think Mendeleev only arranged elements by atomic weight without considering their chemical properties.
Emphasize that Mendeleev prioritized chemical properties over atomic weight when rearranging elements in his periodic table.
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