Atoms, molecules and stoichiometry plan

Unit at a glance

7 lessons, 315 minutes of teaching

Lessons

7, each planned for 45 minutes

Worksheets

7 with answer keys

Quiz questions

56 multiple-choice, assignable in the app

Lab

Stoichiometry lab

Scheme of work

Ref	Lesson pack	Structure	Worksheet	Quiz	Lab tab
2.1	Relative masses Atoms are far too light to weigh in grams, so chemists compare them with one agreed standard: an atom of carbon-12, fixed at exactly 12.	Numbered Heads Together	6 Q, 13 marks	8 MCQ	tab 1
2.2	The mole and the Avogadro constant Nobody can count 10 23 atoms, but anyone can weigh 12 grams of carbon.	Round Table	6 Q, 14 marks	8 MCQ	tab 2
2.3	Formulae and equations An ionic formula balances positive and negative charge.	Rally Robin	6 Q, 14 marks	8 MCQ	none
2.3	Empirical and molecular formulae Analysis tells you what a compound is made of, by mass.	Numbered Heads Together	6 Q, 14 marks	8 MCQ	tab 3
2.4	Reacting masses and limiting reagents A balanced equation gives a ratio of moles, not of grams.	Round Table	6 Q, 17 marks	8 MCQ	tab 4, tab 7
2.4	Volumes of gases At the same temperature and pressure, a mole of hydrogen fills the same space as a mole of carbon dioxide.	Rally Coach	6 Q, 14 marks	8 MCQ	tab 5
2.4	Solutions and titrations Concentration tells you how many moles are in each cubic decimetre of solution.	Numbered Heads Together	6 Q, 18 marks	8 MCQ	tab 6

Each pack holds the plan, worksheet and quiz for its lesson. Teach the rows in order; the lab tabs match the student lessons.

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