What exactly are molecules?
Mrs. West’s sixth-grade science students recently explored the fascinating world of atoms and molecules through a hands-on, inquiry-based activity—using candy as molecular models. Armed with marshmallows, toothpicks, Mike and Ikes, Swedish Fish, and Dots, students followed a detailed key to construct five different molecular structures.
Using provided molecular formulas and a color-coded guide to represent specific atoms, students successfully built models of water (H₂O), carbon dioxide (CO₂), ammonia (NH₃), methanol (CH₃OH), and sodium chloride (NaCl). Throughout the activity, they identified the number of atoms in each compound, analyzed how those atoms bond, and examined the structural differences between neutral molecules and ionic compounds.
By transforming abstract chemical concepts into tangible models, students deepened their understanding of atomic composition and chemical bonding. When asked to reflect on the experience, here’s what they had to say:
“Building molecules taught me that chemistry is less about random chaos and more about stability. By using dots/mike and ike to represent valence electrons, you learn the octet rule, discovering how atoms share or transfer their outermost electrons to reach a molecule build.
This process reveals logic behind chemical bonding, showing exactly why certain atoms pair up while others don't. Ultimately, you realize that these simple candies are actually a map of the electrostatic forces that hold our entire physical world.”
“ During the experiment I learned how the molecules formed. They are formed by atoms coming together, like hydrogen. Also, I remembered how much I like marshmallows.”
“ I have learned that you can make quite literally anything out of anything and that what really matters is having fun.”
Activities like this transform complex scientific concepts into meaningful, memorable learning experiences. By physically constructing molecular models, students moved beyond memorization and engaged in true conceptual understanding—visualizing atomic structure, bonding patterns, and the distinction between covalent molecules and ionic compounds. Hands-on exploration not only strengthened their grasp of foundational chemistry principles but also fostered curiosity, collaboration, and critical thinking. Experiences such as these lay the groundwork for deeper scientific inquiry and inspire students to see science not just as information to learn, but as a dynamic system to explore and understand.
