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Atomic structure — OCR GCSE Physics A J249
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Physics
OCR GCSE Physics A
Matter
Particle model
Atomic structure
OCR GCSE Physics A · J249
Atomic structure
What you need to know
Describe the atom as a positively charged nucleus surrounded by negatively charged electrons.
Understand that the nuclear radius is much smaller than that of the atom.
Recall that almost all of the mass of an atom is concentrated in the nucleus.
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Atomic structure
6 key terms
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Development of the atomic model
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Size of atoms
