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 the gaps left for unknown elements.
- B. It confirmed the order of elements based on atomic mass.
- C. It showed that elements could be arranged randomly.
- D. It proved that all elements have similar properties.
Answer
The correct option is It validated the gaps left for unknown elements..
Explanation
The correct option is It validated the gaps left for unknown elements.. It validated the gaps left for unknown elements. is correct because it directly supports the approved learning objective to explain how discovery of predicted elements supported Mendeleev's table. 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 3dbbb9d5 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Mendeleev's Predictions
Students often think that Mendeleev's predictions were purely random rather than based on chemical properties.
Emphasize that Mendeleev used observed chemical properties to predict the existence and properties of undiscovered elements, which later supported his periodic table.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.