Lesson Plan: C1.3.03

Hamble Lesson Observation Plan
Learning About
What are ionic compounds?
Keywords:
  • Ball and stick model: is a molecular model of a chemical substance which is to display both the three-dimensional position of the atoms and the bonds between them (1)
  • Lattice: a regular repeated three-dimensional arrangement of atoms, ions, or molecules in a metal or other crystalline solid. (1)
  • Electrostatic attraction: the phenomenon where a negatively charged atom or molecule is attracted to a positively charged atom or molecule (1)
  • Ionic compound: is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding (1)
Memory Anchor:
Method Precise Learning Objective Linked Question / Activity
(Designed for maximum working out)		 Stepping Stones Pitstop Check
(Thinking Map)
An ionic compound is a giant structure of ions. What is an ionic compound?
Ionic compounds are held together by strong electrostatic forces of attraction between oppositely charged ions. What do we call the attraction between oppositely charged ions?
These forces act in all directions in the lattice: this is called ionic bonding. Describe the structure of a giant ionic lattice.

Demo giant lattice with pupil particles. Use it to explain properties. Students convert ideas into a diagram and extend themselves by using this to explain properties.
The structure of sodium chloride can be represented in the following forms: ball and stick giant lattice and charged ion ionic lattice. What two models can be used to represent giant ionic structures?

Back to back: in pairs each takes a turn at describing one type of model, limiting use of key terms.
Students should be able to deduce that a compound is ionic from a diagram of its structure in one of the specified forms

Students should be able to describe the limitations of using dot and cross, ball and stick, two and three-dimensional diagrams to represent a giant ionic structure. Give a limitation of each the ball and stick model and charged ion ionic lattice models for representing ionic bonds.

EW: Compare and contrast using the ball and stick model and charged ionic lattice for representing ionic compounds.
Students should be able to work out the empirical formula of an ionic compound from a given model or diagram that shows the ions in the structure. Determine the empirical formulae of a compound given the ions: a) Na+ and N3- b) Al3+ and O2-

Give students several ionic compounds based on the elements they are made up of. Calculate charge on ions and then formula of compound.
Students should be familiar with the structure of sodium chloride but do not need to know the structures of other ionic compounds. Draw out a dot cross diagram to show the ionic bond formed in the compound sodium chloride.

Practical demo: making NaCl on a brick
Links To the Big Ideas
ForcesParticlesEnergyCells