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8. The Periodic Table

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  1. 8.1 Arrangement of elements

    1. • Describe Periodic Table as an arrangement of elements in periods and groups and in order of increasing proton number/atomic number

    2. • Describe change from metallic to non-metallic character across a period

    3. • Describe relationship between group number and the charge of the ions formed from elements in that group

    4. • Explain similarities in the chemical properties of elements in the same group of the Periodic Table in terms of their electronic configuration

    5. • Explain how the position of an element in the Periodic Table can be used to predict its properties

    6. • Identify trends in groups, given information about the elements

  2. 8.2 Group I properties

    1. • Describe Group I alkali metals, lithium, sodium and potassium, as relatively soft metals with general trends down the group, (a) decreasing melting point (b) increasing density (c) increasing reactivity

    2. • Predict the properties of other elements in Group I, given information about the elements

  3. 8.3 Group VII properties

    1. • Describe Group VII halogens, chlorine, bromine and iodine, as diatomic non-metals with general trends down the group, (a) increasing density (b) decreasing reactivity

    2. • State the appearance of the halogens at r.t.p. as: (a) chlorine, a pale yellow-green gas (b) bromine, a red-brown liquid (c) iodine, a grey-black solid

    3. • Describe/explain the displacement reactions of halogens with other halide ions

    4. • Predict the properties of other elements in Group VII, given information about the elements

  4. 8.4 Transition elements

    1. 8.4.1Transition elements as metals that

      • Describe transition elements as metals that: (a) have high densities (b) have high melting points (c) form coloured compounds (d) often act as catalysts as elements and in compounds

    2. 8.4.2Transition elements as having ions

      • Describe transition elements as having ions with variable oxidation numbers, including iron(II) and iron(III)

  5. 8.5 Noble gases

    1. • Describe Group VIII noble gases as unreactive, monatomic gases and explain this in terms of electronic configuration