Calculating Relative Formula Mass

This is a full lesson which teaches students how to calculate relative formula mass.
This lesson is scaffolded, designed for a mixed ability classroom and contains scaffolded worked examples with full answers to all activities.
This lesson is suitable for students studying AQA Trilogy Combined Science (higher and foundation) and AQA Triple chemistry (higher and foundation)

Lesson Objectives

• Recall how to count the number of atoms in a formula
• Recall what relative atomic mass is
• Define what relative formula mass is
• Calculate the relative formula mass of a chemical using a periodic table

Lesson features

• Recap of how to count atoms in a formula (if needed)
• Scaffolded worked examples increasing in difficulty for students to practice finding the atomic mass of elements on the periodic table, and calculating relative formula mass
• Full answers integrated in slides
• Two main/student-led practice activities (independent practice and a BINGO class game) - with varying levels of difficulty to suit all ability levels
• Stretch and challenge task for more able students

Lesson Resource Contains

• Powerpoint (pptx.)