History of the Periodic Table

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  • Created by: Jo Wells
  • Created on: 02-04-13 11:13

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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