Chemistry AS EL CI 11.1 and SL EL4
- Created by: A.B.
- Created on: 23-10-13 17:06
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- EL Periodicity and the Periodic Table CI 11.1 SL EL4
- Mendeleev and the Periodic Table
- Mendeleev arranged the known elements in order of relative atomic mass
- Elements with similar physical and chemical properties were in the same group.
- Swapped elements if he thought they fitted better into another group based on physical and chemical properties.
- Left gaps for elements he thought were yet to be discovered.
- Made predictions about properties of elements yet to be discovered.
- Now arrange in order of atomic number rather than relative atomic mass.
- Periodicity
- Exhibited when
- Regular pattern in a property as you go across a period.
- Regular pattern is repeated in other periods.
- Exhibited when
- Mendeleev and the Periodic Table
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