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Atomic structure
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Atomic structure
Fundamental particles
- An atom consists of a nucleus containing protons and neutrons surrounded by electrons.
Mass number and isotopes
- Mass number = A
- atomic (proton) number = Z
- Isotopes are atoms of the same element (same proton number / atomic number) but with different numbers of neutrons, leading to different mass numbers.
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- A level Chemistry Mind Map on Atomic structure, created by Y B on 15/10/2025.
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- Y B
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