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Identify isotopes

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Identify isotopes — free printable High School Science worksheet

This high-school Physical Science worksheet challenges students to identify isotopes within the context of atomic structure, applying their understanding of atomic number, mass number, and neutron count. Teachers can use it as a structured practice activity after introducing isotope notation, or as a checkpoint assessment within the atomic structure unit. The hard difficulty level pushes students to work carefully with nuclear data and atomic symbols.

Learning objectives

  • Identify isotopes of an element by comparing atomic and mass numbers
  • Explain the relationship between proton count, neutron count, and isotope identity
  • Interpret atomic notation to distinguish between different isotopes of the same element

How to use this worksheet

  1. Select “Sign in / Sign up to download”, then sign in with Google or email to get the PDF from KiwiBee Printables.
  2. Print at home or in class for High School; it's no-prep, with no extra materials needed.
  3. Use the included answer key to mark it in seconds.

Good for

ClassworkHomeworkWarm-upCentersSmall groups

Answer Key

Answer key for Identify isotopes — free printable Science worksheet

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