⏰ when
When was the concept of the periodic table first proposed by John Newlands?
Quick Answer
In 1864, John Newlands proposed the Law of Octaves. He noticed that elemental properties repeated every eighth element when arranged by increasing atomic weight.
The Full Story
John Newlands proposed the Law of Octaves in 1864, several years before Mendeleev’s table. He observed that when elements were ordered by atomic weight, similar properties appeared at regular intervals, roughly every eighth element. Although his idea was initially mocked, it was an important early step toward the periodic table. Newlands’ work showed that elemental properties were not random but followed a repeating pattern.
Key Facts
1.1864 proposal year
2.John Newlands developed the Law of Octaves
3.Properties repeated roughly every eighth element
YouTube Angle
Suggested video title for this topic:
"The early idea that elements repeat like musical notes"
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