SLS Sci10 Nuclear NT
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| alpha particle | a positively
charged atomic particle that is much
more massive than either a beta
particle or gamma radiation and is
relatively slow moving; has same
combination of particles as the
nucleus of a helium atom
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| beta particle | a high speed
electron; emitted by a radioactive
nucleus in beta decay
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| chain reaction | an ongoing process in
which one fission reaction initiates
the next reaction
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| daughter isotope | the stable product
of radioactive decay
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| decay curve | a curved line on a graph
that shows the rate at which
radioisotopes decay
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| fission | a nuclear reaction in which a
large nucleus breaks apart, producing
two or more smaller nuclei,
subatomic particles, and energy
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| fusion | a process in which two low
mass nuclei join together to make a
more massive nucleus
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| gamma radiation | rays of highenergy,
short-wavelength radiation
emitted from the nuclei of atoms
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| half-life | the time it takes for a living tissue, organ, organism, or ecosystem to eliminate one half of
a substance, in physics, the time
required for half the nuclei in a
sample of a radioactive isotope to
decay, which is constant for any
radioactive isotope
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| isotopes | different atoms of a
particular element that have the same
number of protons but a different
numbers of neutrons
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| light | one form of radiation that is
visible to humans
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| mass number | the total number of
protons and neutrons found in the
nucleus of an atom
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| nuclear equation | a set of symbols
that indicates changes in the nuclei
of atoms during a nuclear reaction
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| nuclear reaction | the process in which
an atom’s nucleus changes by
gaining or releasing particles or
energy
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| parent isotope | the isotope that
undergoes radioactive decay
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| radiation | high-energy rays and
particles emitted by radioactive
sources
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| radioactive decay | the process in
which the nuclei of radioactive
parent isotopes emit alpha, beta, or
gamma radiation to form decay
products
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| radiocarbon dating | determining the
age of an object by measuring the
amount of carbon-14 remaining in it
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