Using Lego Bricks: Elements, Compounds, and Mixtures Activity

Exploring Elements, Compounds, and Mixtures using Legos
Exploring Elements, Compounds, and Mixtures using Legos

I use this activity to help students visualize how atoms are used as the building blocks of matter and how matter can be classified as elements, compounds, or mixtures.

Materials

  • 12 Legos – 3 different colors and sizes with 4 of each kind
    • Lego Bricks must be the same size for each color (see photo above)
    • stored in sandwich sized zip-top bags
    • 1 set per 2 students
  • colored pencils
    • I placed 3 crayons in each bag along with the Lego pieces
  • handout (pdf)

Background Information

  • Each Lego Brick represents one atom
  • Each colored Lego Brick represents one atom for each element
    • example: 4 blues = one element, 4 oranges = second element, 4 greens represent a third element
  • When Lego Bricks are snapped together, that represents a chemical bond and one compound
  • Lego Bricks that are not snapped together are not chemically bonded to each other
  • For mixtures, you can have combinations of single bricks (elements), bonded bricks (compounds), or a mixture of both elements & compounds
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