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9702/12/O/N/16
9702/12/O/N/16
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38 What is a proton?
A a hadron
B a particle consisting of two down quarks and one up quark
C a positive fundamental particle
D a positive lepton 39 What are the correct descriptions of a -ray and a particle?
-ray particle
A high-speed electron electromagnetic radiation
B electromagnetic radiation helium-4 nucleus
C electromagnetic radiation high-speed electron
D high-speed electron helium-4 nucleus
40 In a radioactive decay series, three successive decays each result in a particle being emitted.
The first decay results in the emission of a particle. The second decay results in the emission of an particle. The third decay results in the emission of another particle.
Nuclides P and S are compared.
Which statement is correct?
A P and S are identical in all respects.
B P and S are isotopes of the same element.
C S is a different element of lower atomic number.
D S is a different element of reduced mass.
9702/11/O/N/16
9702/11/O/N/16
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