The History of the Periodic Table
- Everything is made up of elements > arranged in periodic table.
- 1869 Dmitri Mendeleev developed periodic table.
- Arranged elements in order of atomic mass.
- Table included all elements and left gaps for those not yet discovered.
- Elements were fitted into a column where it's properties fitted best.
- If they didn't fit then they were put into a spare column.
- Able to predict existence and properties of undiscovered elements eg- silicon.
- Can predict porperties of artifical elements (don't occur naturally.)
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