Activity

Atoms and Their Masses

Curated and Reviewed by Lesson Planet

Are atoms too small to be isolated? Answer this question and more as you provide young chemists with the tools to conduct a hands-on activity demonstrating atomic mass. Pupils explore the mass of copper and aluminum, compare Dalton's historical experiment to those of modern-day scientists, and witness single displacement reactions as they complete a series of steps to form a chemical compound. 

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Instructional Ideas
  • Take the experiment one step further and perform a double displacement reaction upon conclusion of the first activity
Classroom Considerations
  • Class members should have prior knowledge of balance operation
  • Ensure safety precautions are in place, and make certain all chemical spills are cleaned immediately
  • This is the third installment in a 9-part series
Pros
  • Ability to engage multiple learners through tactile use of weighing chemicals on scientific balance and relating this to important concepts
  • Detailed steps provide a way for each pupil to work independently, if this is a chosen method, for the duration of the activity
Cons
  • Document permissions do not allow for printing