0 0 Moodle
Home Revision Notes Courses For Schools Blog My Account Cart
Moodle
OCR A Level Chemistry A – Module 3 Periodic Table and Energy

3.1.1
Periodicity

Section 3.1.1 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 2.2.2 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
Topic Parts
5 of 5 live
Ionisation Energy, Periodic Trends + 2.2.2 links
Exam Board
OCR A
H432 (2015 onwards)

Revision Notes

Work through 3.1.1 in a structured sequence.

Energy
Ionisation
Energy
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)).

Start revising
Trends
Periodic
Trends
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)).

Start revising
Lattices
Metallic
Bonding
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.

Start revising
Lattices
Giant
Covalent
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.

Start revising
Compare
Structure
Types
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)).

Start revising
Specification Coverage

3.1.1 Periodicity – OCR A Level Chemistry A

The following OCR A learning outcomes state what candidates should be able to do. Wording is taken from the OCR A Level Chemistry A (H432) specification.

3.1.1 Periodicity

3.1.1(a)
The Periodic Table
i
the periodic table as the arrangement of elements by increasing atomic (proton) number
ii
the periodic table as the arrangement of elements in periods showing repeating trends in physical and chemical properties (periodicity)
iii
the periodic table as the arrangement of elements in groups having similar chemical properties
3.1.1(b)
Periodic trend in electron configuration and blocks
i
the periodic trend in electron configurations across Periods 2 and 3 (see also 2.2.1 d)
ii
classification of elements into s-, p- and d-blocks
3.1.1(c)
Ionisation energies
i
first ionisation energy (removal of 1 mol of electrons from 1 mol of gaseous atoms)
ii
successive ionisation energy
i)-a
explanation of the trend in first ionisation energies across Periods 2 and 3, in terms of attraction, nuclear charge and atomic radius
i)-b
explanation of the trend in first ionisation energies down a group, in terms of attraction, nuclear charge and atomic radius
ii)-a
prediction from successive ionisation energies of the number of electrons in each shell of an atom
ii)-b
prediction from successive ionisation energies of the group of an element
3.1.1(d)
Metallic bonding
i
explanation of metallic bonding as strong electrostatic attraction between cations (positive ions) and delocalised electrons
ii
explanation of a giant metallic lattice structure, e.g. all metals
3.1.1(e)
Giant covalent lattices
i
explanation of the solid giant covalent lattice of diamond as a network of atoms bonded by strong covalent bonds
ii
explanation of the solid giant covalent lattice of graphite as a network of atoms bonded by strong covalent bonds
iii
explanation of the solid giant covalent lattice of graphene as a network of atoms bonded by strong covalent bonds
iv
explanation of the solid giant covalent lattice of silicon as a network of atoms bonded by strong covalent bonds
3.1.1(f)
Properties of giant lattices
i
explanation of the melting and boiling points of giant metallic lattices in terms of structure and bonding
ii
explanation of the solubility of giant metallic lattices in terms of structure and bonding
iii
explanation of the electrical conductivity of giant metallic lattices in terms of structure and bonding
iv
explanation of the melting and boiling points of giant covalent lattices in terms of structure and bonding
v
explanation of the solubility of giant covalent lattices in terms of structure and bonding
vi
explanation of the electrical conductivity of giant covalent lattices in terms of structure and bonding
3.1.1(g)
Melting points across Periods 2 and 3
explanation of the variation in melting points across Periods 2 and 3 in terms of structure and bonding (see also 2.2.2 o)