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OCR A Level Chemistry A – Module 3 Periodic Table and Energy

3.1.1
Periodicity

This section covers the arrangement of the Periodic Table, periodic trends in electron configuration, first and successive ionisation energies, and the structures and melting points of the elements across Periods 2 and 3.

Ionisation energy and periodic trends are here. Metallic bonding and giant covalent lattices are on the Bonding and Structure pages linked below.

Exam Paper
Paper 1 & 2
H432/01 and H432/02
Specification Points
3.1.1 (a) – (g)
7 learning outcomes
Sub-topics
5 lessons
Ionisation Energy, Periodic Trends + 2.2.2 links
Exam Board
OCR
H432 (2015 onwards)

Revision Notes

5 revision notes, in the order the specification teaches them.

An electron pulled clear of an atom
1

Ionisation Energy

First and successive ionisation energies, the factors behind them, trends across Periods 2 and 3 and down a group (3.1.1 (c)).

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The periodic table laid out in coloured blocks
2

Periodic Trends

The Periodic Table as an arrangement by proton number, periodicity, blocks, and the trends in atomic radius, ionisation energy and melting point across Periods 2 and 3 (3.1.1 (a), (b), (g)).

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Rows of metal ions in a sea of electrons
3

Metallic Bonding (2.2.2)

Giant metallic lattices and the properties of metals (3.1.1 (d), (f)), on the 2.2.2 Bonding and Structure pages.

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A diamond network beside graphite layers
4

Giant Covalent Structures (2.2.2)

Diamond, graphite, graphene and silicon and their properties (3.1.1 (e), (f)), on the 2.2.2 Bonding and Structure pages.

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Separate small molecules beside one giant network
5

Structure Types (2.2.2)

The four lattice types compared: melting point, conductivity and solubility from structure and bonding (3.1.1 (f), (g)).

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Revision Game

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Study Cards

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Specification

Every specification point in this topic, in the exam board's own words. Rate how confident you are with each one.

Official OCR documentsSpecification (opens the OCR website in a new tab)Data sheet (opens the OCR website in a new tab)

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3.1.1

  1. a (i)

    the periodic table as the arrangement of elements by increasing atomic (proton) number

    Revise
  2. a (ii)

    the periodic table as the arrangement of elements in periods showing repeating trends in physical and chemical properties (periodicity)

    Revise
  3. a (iii)

    the periodic table as the arrangement of elements in groups having similar chemical properties

    Revise
  4. b (i)

    the periodic trend in electron configurations across Periods 2 and 3 (see also 2.2.1 d)

    Revise
  5. b (ii)

    classification of elements into s-, p- and d-blocks

    Revise
  6. c i

    first ionisation energy (removal of 1 mol of electrons from 1 mol of gaseous atoms)

    Revise
  7. c ii

    successive ionisation energy

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  8. c (i) a

    explanation of the trend in first ionisation energies across Periods 2 and 3, in terms of attraction, nuclear charge and atomic radius

    Revise
  9. c (i) b

    explanation of the trend in first ionisation energies down a group, in terms of attraction, nuclear charge and atomic radius

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  10. c (ii) a

    prediction from successive ionisation energies of the number of electrons in each shell of an atom

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  11. c (ii) b

    prediction from successive ionisation energies of the group of an element

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  12. d (i)

    explanation of metallic bonding as strong electrostatic attraction between cations (positive ions) and delocalised electrons

  13. d (ii)

    explanation of a giant metallic lattice structure, e.g. all metals

  14. e i

    explanation of the solid giant covalent lattice of diamond as a network of atoms bonded by strong covalent bonds

  15. e ii

    explanation of the solid giant covalent lattice of graphite as a network of atoms bonded by strong covalent bonds

  16. e iii

    explanation of the solid giant covalent lattice of graphene as a network of atoms bonded by strong covalent bonds

  17. e iv

    explanation of the solid giant covalent lattice of silicon as a network of atoms bonded by strong covalent bonds

  18. f i

    explanation of the melting and boiling points of giant metallic lattices in terms of structure and bonding

  19. f ii

    explanation of the solubility of giant metallic lattices in terms of structure and bonding

  20. f iii

    explanation of the electrical conductivity of giant metallic lattices in terms of structure and bonding

  21. f iv

    explanation of the melting and boiling points of giant covalent lattices in terms of structure and bonding

  22. f v

    explanation of the solubility of giant covalent lattices in terms of structure and bonding

  23. f vi

    explanation of the electrical conductivity of giant covalent lattices in terms of structure and bonding

  24. g

    explanation of the variation in melting points across Periods 2 and 3 in terms of structure and bonding (see also 2.2.2 o)

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