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Topic 8 - nuclear and particle physics Questions and and answers

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Topic 8 - nuclear and particle physics Questions and and answers

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  • June 25, 2024
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  • 2023/2024
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Topic 8 - nuclear and particle physics
What symbol is used to indicate nucleon number?
A


What symbol is used to indicate proton number?
Z


Which particles experience strong nuclear force?
Hadrons


Define a baryon
A hadron formed from three quarks


Define a meson
A hadron formed with a quark anti-quark pairing


What is thermionic emission?
When a metal is heated, providing energy for electrons to escape


Describe Thompsons model of atomic structure
negative electrons embedded in a spherical cloud of positive charge


Describe rutherfords model of atomic structure
A very dense positively charged nucleus surrounded by electrons (bohr lated proved
orbitals)


Describe rutherfords alpha particle scattering experiment
A beam of alpha particles (helium nuclei) were fired at a thin foil of gold nuclei. They
were detected by a screen


What were the outcomes of rutherfords alpha particles scattering experiment? What
do they indicate?
Most particles were not deflected - atoms are mostly empty space
Some particles were deflected less than 90° - there is a charged nucleus

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