Many people confuse atomic mass and atomic numbers. The sixth of seven lessons in a unit requires scholars to find the weight of different groups of pennies. Then, they must solve how many of each type of penny exists in a closed system by setting up and solving a system of equations.

Concepts

atomic mass, system of equations word problems, isotopes, percent proportion

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Additional Tags

science

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Instructional Ideas

• Set up multiple isotopes in different colored balloons so students or groups that finish early can solve another problem for additional practice

Classroom Considerations

• Check the dates on the pennies used in the experiment before starting
• Relies on prior knowledge of atomic mass and solving systems of equations

Pros

• Connects math and science through a hands-on application
• Requires only basic materials

Cons

• None

Common Core

HSA-CED.A.3 HSA-REI.C.6