AS 91172 · 3 credits · Internal
Atomic physics
Demonstrate understanding of atomic and nuclear physics
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This standard asks you to show you understand the structure of atoms and how nuclei behave and change. You'll need to explain atomic models, radioactive decay, nuclear reactions (fission and fusion), and the energy involved in nuclear processes—using both written explanations and maths when it's relevant.
What to do, grades and common mistakes
- ·Explain atomic models (Thomson's and Rutherford's) and connect them to experimental evidence like the gold foil experiment
- ·Describe nuclear transformations including radioactive decay, half-life, fission, and fusion reactions
- ·Apply conservation laws for atomic and mass numbers to predict products of nuclear reactions
- ·Relate nuclear physics concepts to real applications like power generation and describe properties of nuclear emissions (ionising and penetration ability)
- ·Use relevant equations (E = mc², P = E/t) in solutions with mathematical reasoning
You write statements showing you know how atomic and nuclear concepts relate to a situation, and complete basic calculations using the given information.
You explain *why* atomic and nuclear concepts apply to a situation (giving reasons), and handle problems where information isn't immediately obvious or needs working out.