Unit Test — Unit test Answers
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An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?
A
It accepted radiation in a chemical reaction.B
It donated neutrons to another atom in a chemical reaction.C
It emitted an alpha particle in a nuclear reaction.D
It released a beta particle in a nuclear reaction.22
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What is the difference between the units rem and rad?
A
Rem is a conventional unit, and rad is an SI unit.B
Rem is an SI unit, and rad is a conventional unit.C
Rem is used to measure biological risk, and rad is used to measure absorbed radiation.D
Rem is used to measure absorbed radiation, and rad is used to measure biological risk.23
A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide?
A
Superscript 32 subscript 17 upper P
B
Superscript 17 subscript 15 upper P.
C
Superscript 30 subscript 15 upper P.
D
Superscript 32 subscript 15 upper P.
24
Which is a characteristic of nuclear fusion but NOT nuclear fission?
A
releases large amounts of energyB
is the energy source of starsC
is used in electric power plantsD
requires little energy to occur25
Which type of radiation travels at the speed of light and penetrates matter easily?
A
beta particlesB
radionuclidesC
alpha particlesD
gamma raysDid you find these answers helpful?
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