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Questions and Answers
How did Dobereiner arrange elements in his triads?
How did Dobereiner arrange elements in his triads?
- In order of valency
- In increasing order of atomic weights (correct)
- In order of metallic character
- In order of atomic numbers
What was the flaw found in Newland's method of arranging elements?
What was the flaw found in Newland's method of arranging elements?
- Repetition of elements (correct)
- Inconsistent atomic weights
- Failure to account for undiscovered elements
- Lack of periodicity
What did Mendeleeff's Periodic Table fail to justify the position of?
What did Mendeleeff's Periodic Table fail to justify the position of?
- Elements with variable valency
- Rare earth elements (correct)
- Elements with non-metallic character
- Isotopes
What was Moseley's key improvement over Mendeleeff's Periodic Table?
What was Moseley's key improvement over Mendeleeff's Periodic Table?
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In Dobereiner's triads, what was the relationship between the atomic weight of the middle element and the other two?
In Dobereiner's triads, what was the relationship between the atomic weight of the middle element and the other two?
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What was the critical flaw of Newland's arrangement method regarding undiscovered elements?
What was the critical flaw of Newland's arrangement method regarding undiscovered elements?
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