Nuclear Atom Cambridge IGCSE O level Physics 0625 0972 5054 Lesson 72 Part a

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5 Atomic physics
5.1 The nuclear atom
5.1.1 Atomic model
Core
•• Describe the structure of an atom in terms of a
positive nucleus and negative electrons
Supplement
•• Describe how the scattering of α-particles by
thin metal foils provides evidence for the nuclear
atom
5.1.2 Nucleus
Core
•• Describe the composition of the nucleus in terms
of protons and neutrons
•• State the charges of protons and neutrons
•• Use the term proton number Z
•• Use the term nucleon number A
•• Use the term nuclide and use the nuclide
notation AZ
X
•• Use and explain the term isotope
Supplement
•• State the meaning of nuclear fission and nuclear
fusion
•• Balance equations involving nuclide notation
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Sir are alpha particles smaller than atoms?

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