Question detail
What was a reason for the misplacement of some elements in 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 had a higher atomic number than expected
- B. They were not metals
- C. Their chemical properties did not match their group
- D. They were isotopes of other elements
Answer
Their chemical properties did not match their group
Explanation
Some elements were placed in groups based on atomic weight, but their chemical properties did not align with those of other elements in the same group.
Common mistake
Misplacement of Elements
Students often think that all elements can be placed in groups based solely on their atomic weight without considering their properties.
Emphasize that elements were sometimes placed in inappropriate groups because atomic weight did not account for their chemical properties, leading to inconsistencies in the periodic table.
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