Identify isotopes
Free printable Chemistry science worksheet for "Identify isotopes" — practice atomic structure. No-prep, print or assign online.
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
Answer Key
How to use this worksheet
- Click “Download Worksheet” and sign in with Google or email to get the PDF instantly.
- Print at home or in class for High School; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
Frequently asked questions
Is the “Identify isotopes” worksheet free?
Yes. “Identify isotopes” is a free printable Science worksheet. Sign in with Google or email to download the PDF instantly.
What grade or age is this Science worksheet for?
It's designed for High School (ages 14–18), covering Atomic structure.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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