Question

The law of octaves was proposed by:

• A. Dmitri Mendeleev
• B. John Newlands
• C. Lothar Meyer
• D. J.J. Thomson

Hint:

The law of octaves was an early attempt to organize elements, and it laid the foundation for the periodic law.

Answer 1

The Correct Option is B

1. Understanding the law of octaves:
The law of octaves is an early attempt to organize the elements based on their atomic weights. It was proposed by John Newlands in 1864. 2. Observation made by Newlands:
Newlands observed that when elements were arranged in increasing order of atomic weights, every eighth element had properties similar to the first one, similar to the musical octave. This pattern was notable for the lighter elements but became less reliable for heavier elements. 3. Significance of the law:
Although Newlands' law of octaves was not fully accepted at the time, it laid the groundwork for later, more refined models of the periodic table.