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Free printable chemistry activities

Three original worksheets. Print this page or save it as a PDF. Teacher answers are on the For Teachers page.

Dr. Masadeh’s Chemistry Corner · Beginner · 15 min

Particle Detective

Name: __________________________ Date: ______________

Open Chemistry Arcade → Virtual Experiments → PhET simulations. Use a particle model to guide your answers. This is a virtual activity; no chemicals needed.

  1. Draw four identical O₂ molecules. Is your drawing an element, a compound, or a mixture? Explain.
  2. Draw four H₂O molecules. Label the two kinds of atoms. Why is this a compound?
  3. Draw O₂ and H₂O in the same box without changing the molecules. What makes this a mixture?
  4. Can a mixture contain both elements and compounds? Support your answer with your drawing.

Original worksheet: Chemistry Corner · Related simulation: PhET, University of Colorado Boulder · dr-masadehs-chemistry-corner.emasadeh.chatgpt.site/arcade#simulations

Dr. Masadeh’s Chemistry Corner · College · 20 min

Shape, Polarity & Evidence

Name: __________________________ Date: ______________

Predict first. Then check with Molecular Shape Speed Challenge in the Arcade. Use ideal or approximate VSEPR angles, as appropriate.

  1. Draw Lewis structures for CO₂, H₂O, and NH₃. Mark lone pairs on the central atom.
  2. For each molecule, name the molecular geometry and approximate bond angle. Explain the effect of lone pairs.
  3. Which molecules are polar? Use geometry and bond dipoles to justify each answer.
  4. Explain why polar bonds alone do not guarantee a polar molecule.

Original worksheet: Chemistry Corner · dr-masadehs-chemistry-corner.emasadeh.chatgpt.site/arcade#molecular-shape-challenge

Dr. Masadeh’s Chemistry Corner · Intermediate · 15 min

One Molecule, One Discovery

Name: __________________________ Date: ______________

Open this week’s molecule or discovery from the homepage. Check the linked original record or source.

  1. Write the molecule’s name and formula, or the discovery’s title and publication date. Record the source.
  2. Describe one structure or finding in your own words. What does the source actually show?
  3. Create an everyday analogy that helps explain the idea. What does your analogy leave out?
  4. Write one question that would need more evidence. Suggest what kind of observation could help.

Original worksheet: Chemistry Corner · Source ownership remains with the credited publisher · dr-masadehs-chemistry-corner.emasadeh.chatgpt.site/#weekly

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