DSE Chem revision
Topic 12. Patterns in the chemical world
A. Periodic variation in physical properties of the elements from Li to Ar
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variation in the nature of bonding
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variations in melting point and electrical conductivity
B. Bonding, stoichiometric composition and acid-base properties of the oxides of elements from Na to Cl
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the position of the elements in the Periodic Table related to their electronic arrangements
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similarities in chemical properties among elements in Groups I, II, VII and 0
C. General properties of transition metals
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coloured ions
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variable oxidation state
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catalytic properties
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