⚖️ Conservation of Mass in Chemical Reactions

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MS-PS1-5

Conservation

Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.

Disciplinary Core Ideas (DCI)

PS1.B: Chemical Reactions
The total number of atoms of each type is conserved in chemical reactions, and thus the mass does not change. Substances react chemically in characteristic ways with other substances to form new substances.

🎯 Learning Objectives

  • Understand that atoms are conserved in chemical reactions
  • Recognize that mass is conserved because atoms don't change identity
  • Apply conservation principles to balance chemical equations
  • Analyze mass relationships in chemical reactions

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