Atomic structure — WJEC GCSE Physics
In summary: Atomic structure is a key topic in WJEC GCSE Physics. Key exam tip: Ensure decay equations are balanced for both mass number and atomic number
Exam Tips for Atomic structure
- Ensure decay equations are balanced for both mass number and atomic number
- Use standard form when dealing with nuclear sizes
- Clearly distinguish between the hazards of contamination and irradiation
- Be prepared to interpret half-life data from tables or graphs
Common Mistakes
- Confusing contamination with irradiation
- Incorrectly balancing decay equations by failing to conserve mass or atomic number
- Misinterpreting half-life graphs or failing to calculate ratios correctly
- Confusing the properties of alpha, beta, and gamma radiation
Marking Points
- Description of the nuclear atom model (plum pudding vs Bohr)
- Identification of protons, neutrons, and electrons in atomic structure
- Use of atomic notation (A/Z X) for isotopes
- Balanced equations for radioactive decay (alpha, beta, gamma)
- Explanation of half-life and random nature of decay
- Differences in penetration properties of radiation
- Distinction between contamination and irradiation
- Explanation of nuclear fission and fusion processes
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