
A complete, ready-to-teach lesson for Unit 1 (Principles and Applications of Science I), chemistry section: balancing equations, relative atomic mass from isotopes, and relative formula mass.
Learning objectives:
- Write and balance chemical equations, including state symbols.
- Define relative atomic mass and calculate it from isotopic abundances.
- Interpret a simple mass spectrum of an element.
- Calculate relative formula masses, including hydrated compounds.
What’s included:
- Student worksheet (PDF and editable Word)
- Teacher version with model answers and mark schemes (PDF and editable Word)
- Teacher notes: lesson flow, common misconceptions and practical/safety notes
- Retrieval starter (5 marks)
- Structured tasks with key-idea boxes and clear diagrams
- Check for Understanding quiz (10 marks) with a confidence self-assessment
- Exam-style practice (15 marks), ending with a levels-marked 6-mark question with indicative content
Specification coverage:
- A1 · Quantities: balanced equations with state symbols.
- A1 · Quantities: relative atomic mass (Ar) and relative formula mass (Mr).
About 60 minutes of teaching; the exam-style section works in class or as homework. All questions are original.
Written for the Pearson BTEC Level 3 Nationals in Applied Science. Not endorsed by Pearson. Single-school licence.
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