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Questions and Answers
Which chemist proposed the law of triads grouping elements in threes based on their similar properties?
Which chemist proposed the law of triads grouping elements in threes based on their similar properties?
- Dmitri Mendeleev
- J.W. Dobereiner (correct)
- J.A. Newlands
- Henry Moseley
In Dobereiner's law of triads, the atomic mass of the middle element was approximately equal to:
In Dobereiner's law of triads, the atomic mass of the middle element was approximately equal to:
- The sum of the other two elements' atomic masses
- The arithmetic mean of the other two elements' atomic masses (correct)
- Half of the atomic mass of the heaviest element
- Twice the atomic mass of the lightest element
What is the basis of classification in Newlands' Law of Octaves?
What is the basis of classification in Newlands' Law of Octaves?
- Valency
- Atomic mass (correct)
- Electronegativity
- Atomic number
How did J.A. Newlands relate his Law of Octaves to musical notes?
How did J.A. Newlands relate his Law of Octaves to musical notes?
The Law of Octaves is named as such because it involves a repetition pattern after how many elements?
The Law of Octaves is named as such because it involves a repetition pattern after how many elements?
What was a major drawback of Newlands' law of Octaves?
What was a major drawback of Newlands' law of Octaves?
Why was the ninth element crucial for the rejection of the idea of octaves?
Why was the ninth element crucial for the rejection of the idea of octaves?
What was the fundamental property used by Newlands for classifying elements?
What was the fundamental property used by Newlands for classifying elements?
What distinguished Meyer and Mendeleev's work from Newlands' law of Octaves?
What distinguished Meyer and Mendeleev's work from Newlands' law of Octaves?
Why was Mendeleev's classification more widely accepted than Newlands' law of Octaves?
Why was Mendeleev's classification more widely accepted than Newlands' law of Octaves?
