Middle school3 lessons

Atoms and molecules

From the simplified atomic model to molecules: matter is made of organized grains. Chemical symbols and first formulas.

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The simplified atomic model

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  1. The simplified atomic model
  2. Atoms, molecules, ions
  3. Chemical symbols and formulas
5 questions+15 XP to earn

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A few short questions to confirm the essentials are in place. Every answer is explained.