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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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Topic 8 - nuclear and particle physicsWhat 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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