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Questions and Answers
Who is generally credited with the development of the Modern Periodic Table?
Who is generally credited with the development of the Modern Periodic Table?
- Dobereiner
- Mendeleev (correct)
- Newlands
- Chancourtois
Which chemist noted that every eighth element had properties similar to the first element, proposing the Law of Octaves?
Which chemist noted that every eighth element had properties similar to the first element, proposing the Law of Octaves?
- Dobereiner
- Lothar Meyer
- Mendeleev
- Newlands (correct)
In what year did the French geologist A.E.B. de Chancourtois arrange the known elements in order of increasing atomic weights?
In what year did the French geologist A.E.B. de Chancourtois arrange the known elements in order of increasing atomic weights?
- 1862 (correct)
- 1865
- 1869
- 1887
What did Lothar Meyer plot against atomic weight to obtain a periodically repeated pattern?
What did Lothar Meyer plot against atomic weight to obtain a periodically repeated pattern?
What did the Law of Triads initially seem to work for?
What did the Law of Triads initially seem to work for?
What was the primary motivation behind classifying elements?
What was the primary motivation behind classifying elements?
What observation did Johann Dobereiner make about certain groups of three elements (Triads)?
What observation did Johann Dobereiner make about certain groups of three elements (Triads)?
What was significant about the number of known elements in 1865 compared to 1800?
What was significant about the number of known elements in 1865 compared to 1800?
What is the current number of known elements?
What is the current number of known elements?
Which statement is true about the recently discovered elements mentioned in the text?
Which statement is true about the recently discovered elements mentioned in the text?
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