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GCSE Questions: Nuclear Structure Q4. Atomic models have changed over time.
Old atomic model – Atoms are a positive mass with negative electrons fixed in it. Current atomic model – Atoms are made from protons, neutrons and electrons. Protons and neutrons are in a central nucleus surrounded by a cloud of electrons.
(a) Write down two differences between these models. [2 marks] (b) Why did the atomic model change? [2 marks] (Total 4 marks)
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Cyberphysics - a web-based teaching aid - for students of physics, their teachers and parents....
