History of the Periodic Table
- Created by: Jo Wells
- Created on: 02-04-13 11:13
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Early 1800s - could only go on Atomic Mass:
2 ways to categorise elements:
1. by physical and chemical properties
2. by their relative atomic mass
Newland's Law of Octaves (1864)
He noticed every 8th element had similar properties - listed some of the known elements in rows of seven
Pattern broke down in 3rd row - transition metals (e.g. Ti and Fe) messing it up
He was criticised by Chemical Society (1865) because:
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