www.eastmarinedrive.com 2006. Last week our focus was separating mixtures. This included:. 1. Dissolving and evaporation. (How can we separate a mixture of salt and sand?) 2. Both simple and fractional distillation. (How do we extract petrol LPG and diesel from crude oil?)
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1. Dissolving and evaporation. (How can we separate a mixture of salt and sand?)
2. Both simple and fractional distillation. (How do we extract petrol LPG and diesel from crude oil?)
3. Filtering (Research the use of filters in everyday life)
5, Centrifuging (Separating by centrifugal force)
1. Element and compounds
2. The work and thinking of the scientists who developed
the periodic table (Hennig Brand,Johann Dobereiner,
John Newlands and Dimitri Mendeleev)
3. The physical properties of both metals and non metals
4. How the periodic table is organised
(Groups, periods, atomic and mass numbers)
5. The reactivity of some elements
Based purely on observation and reasoning. Early Greeks thought that all matter was composed of 4 basic elements (or building blocks).
It will produce ash, (this is earth!)
The wood produces fire
And lots of smoke this could be air?
You may see liquid bubbling up through the wood (water!)
contains a mixture of all 4 elements
one type of atom
They cannot be broken down into simpler substances by any chemical means
Earth, Air Fire and water are not elements
Where? and What?
The Philosopher's Stone
Timeline of Element Discovery
Before a Periodic Table could be developed it was necessary to discover the elements
The first big step happened in 1649