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C3 REVISION NOTES
EARLY PERIODIC TABLE
When scientists arranged elements in order of their atomic weights they found similar
properties at regular intervals.
Mendeleev produces a table that became the basis for the modern periodic table.
The early tables of elements were based on atomic weights (relative atomic mass).

THE…

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WATER AND SOLUBILITY
Many ionic compounds and some molecular substances dissolve in water.
A saturated solution has dissolved the maximum amount of solute at a given temperature.
Water vapour cannot be seen.

SOLUBILITY CURVES
Solubility curves show how solubility changes with temperature.
The solubility of most solids increases with increasing…

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Lithium = bright red
Sodium = golden yellow
Potassium = lilac
Calcium= brick red
Barium = green
Magnesium = no colour
Aluminium, calcium and magnesium ions form a white precipitate when mixed with hydroxide.
Ionic equation:
Al3+(aq) + 3OH-(aq) Al(OH)3(S)
Copper hydroxide is blue
Iron (II) hydroxide is green and…

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Mass spectroscopy
Chromatography
Spectroscopic methods depend on different substances absorbing different types of
radiation.

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