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A Geiger counter measures radiation indirectly by measuring flashes of light electrons released by ionization speaker static curies answer:...

1. A Geiger counter measures radiation indirectly by measuring
flashes of light
electrons released by ionization
speaker static
curies
answer: electrons released by ionization
2. Reactor control rods are made of a substance that
absorbs neutrons
reflect neutrons
emits neutrons
slow down neutrons so they produce more fission.
answer: absorbs neutrons
3. The isotope U-238 is most likely to emit
a gamma ray
a beta particle
an alpha particle
It is not possible to predict
answer: an alpha particle
4. Besides U-235, another isotope that can undergo nuclear fission is
Pu-239
Th-230
U-238
Pb-210
answer: Pu-239
5. This type of radiation can easily pass through a human.
gamma
ultra-violet
beta
alpha
answer: gamma
6. The ejection of a beta particle from a nucleus results in
an increase of the mass number by four
a decrease of the atomic number by one
an increase of the atomic number by one
a decrease of the mass number by four
answer: an increase of the atomic number by one

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