All Equations, formulas and nomenclature articles – Page 3

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On This Day – Jul 09 : Amedeo Avogadro died

His hypothesis – now known as Avogadro’s Law – states that equal volumes of gases at a given temperature and pressure contain the same number of molecules. This is now widely accepted, and the number of molecules in a mole is referred to as Avogadro’s number, 6.023 x 10²³.

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On This Day - Apr 17 : Chemical naming established

This book presented a logical system for naming chemical substances. Proposed names were based on the origin or function of each element, and led to an international consensus for naming chemicals.

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Minerals & elements in the Earth's Crust

Use questions about the composition of minerals and ores to reinforce work on elements, compounds, symbols and formulae.

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Gridlocks: 101 printable chemistry puzzles

Explore these sudoku-style chemistry puzzles with printable worksheets and answers, and discover how they can be used to engage your students with key topics.

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28 chemistry puzzles for 14-16 years

Use these sudoku-inspired puzzles with printable worksheets and answers to help 14–16 year olds consolidate their understanding of key chemical concepts.

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45 chemistry puzzles for 16-18 years

Try these chemistry puzzles based on sudoku to help 16–18 year old students consolidate their knowledge about key topics, with printable worksheets and answers.

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28 chemistry puzzles for 11-14 years

Try these sudoku-style chemistry puzzles for 11–14 year olds to reinforce your students’ understanding of key ideas, featuring printable worksheets and answers.

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Rules for naming hydrocarbons: alkanes to arenes | 16-18 years

Review the rules for naming hydrocarbon structures, including alkanes, alkenes, alkynes and arenes, using this lesson plan with activities for 16–18 year olds.

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Writing word equations and finding reaction patterns | 14-16 years

Try this lesson plan for 14–16 year olds to help your students identify patterns in chemical reactions and practise writing word equations to describe them.

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Exploring precipitation reactions using diagrams | 14-16 years

Discover how ions are arranged in precipitation reactions and practise completing ionic equations using this lesson plan with activities for 14–16 year olds.

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What do chemical words mean? Exploring key terms | 14-16 years

Explore and clarify key concepts including substance, pure, element, compound, atom and molecule using this lesson plan with activities for 14–16 year olds.

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Practising calculations in chemistry | 14-16 years

Help your students check or revise key calculations in chemistry, including relative formula mass, using this lesson plan with activities for 14–16 year olds.