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- 1. Multiple Choice
A
B
C
D
- 2. Multiple Choice
A nucleus X is radioactive and decays into a nucleus Y.
X and Y are isotopes of the same element. Which combination of particles could have been emitted during the decay process?
- 3. Multiple Choice
A positively charged meson consists of a quark and an antiquark. What could be the quark and antiquark?
charm and antiup
down and antitop
strange and antibottom
up and antistrange
- 4. Multiple Choice
The figure shows part of a chart of nuclides where neutron number is plotted against proton
number. An unstable nuclide X decays by emitting an α-particle. Which nuclide is formed by the decay of nuclide X?
A
B
C
D
- 5. Multiple Choice
The nuclei of common isotopes of hydrogen, helium, lithium and beryllium are shown. Which nucleus contains equal numbers of up and down quarks?
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