10 Questions
Which chemist proposed the law of triads grouping elements in threes based on their similar properties?
J.W. Dobereiner
In Dobereiner's law of triads, the atomic mass of the middle element was approximately equal to:
The arithmetic mean of the other two elements' atomic masses
What is the basis of classification in Newlands' Law of Octaves?
Atomic mass
How did J.A. Newlands relate his Law of Octaves to musical notes?
Every eighth element has properties similar to the first element
The Law of Octaves is named as such because it involves a repetition pattern after how many elements?
8 elements
What was a major drawback of Newlands' law of Octaves?
It failed to classify elements with atomic masses greater than 40 u.
Why was the ninth element crucial for the rejection of the idea of octaves?
It exhibited properties similar to the first element.
What was the fundamental property used by Newlands for classifying elements?
Atomic mass
What distinguished Meyer and Mendeleev's work from Newlands' law of Octaves?
They included almost all known elements in their classification.
Why was Mendeleev's classification more widely accepted than Newlands' law of Octaves?
Mendeleev's classification included a broader range of elements.
Learn about J.W. Dobereiner's law of triads, where elements are grouped in threes based on similar properties and atomic mass. Also discover Newlands' law of octaves, which proposed that when elements are arranged by increasing atomic mass, every eighth element would have similar properties.
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