Nuclear chem test
a radioactive isotope has a half life of 2.5 years. Which fraction of the original mass remains unchanged after 10 years
1/16
Which radioisotope has the fastest decay
37 Ca
Which nuclear emission is negatively charged
A beta particle
Fission and fusion reaction both release energy. However only fusion reactions
Combine light nuclei
Which reaction releases the greatest amount of energy per mole of reactant
Fission
Which change occurs during a nuclear fission reaction?
Mass is converted to energy
Which net change occurs in a nuclear fusion reaction
Mass is converted to energy
What occurs in both fusion and fission reactions
Small amounts of matter are converted into large amounts of energy
The process in which the nucleus of an atom of one element is changed into the nucleus of an atom of a different element
Transmutation
What term represents a nuclear reaction
Transmutation
Which radioisotope is used in dating geological reforms
U-238
what is one benefit associated with nuclear fission reaction
a large amount of energy is produced
a carbon 14 atom spontaneously decayed to form a nitrogen-14 atom this change took place because
a transmutation occurred with particle emission
which nuclear emission has the greatest mass
alpha particle
which list of nuclear emissions is arranged in order from least penetrating power to the greatest penetrating power
alpha particle,beta particle, gamma ray
bombarding a nucleus with high energy particles that change it from one element into another is called
artificial transmutation
which nuclear emission moving through an electric field would be attracted towards a positive electrode
beta particle
as an atom of a radioactive isotope emits an alpha particle the mass number of the atom
decreases
positrons and beta particles have
different charges and the same mass
Which phrase describes the decay modes and the half lives of k-37 and k-42
different decay modes and different half lives
what list of particles is in order of increasing mass
electron, proton alpha particle
nucleus splits and mass is converted to energy
fission
when a uranium nucleus breaks up into fragments which type of nuclear reaction occurs?
fission
which type of reaction produces energy and intensely radioactive waste products
fission of uranium
which list of nuclear emissions is arranged in order from least to greatest penetrating power to the least penetrating power
gamma ray, beta particle, alpha particle
what nuclear emission has no charge and no mass
gamma rays
iodine-131 is used for diagnosing thyroid disorders because it is absorbed by the thyroid gland and
has a very short half life
the fusion of hydrogen nuclei with the release of energy can be initiated by a fission reaction because the fission reactions provides a
high temperature and high pressure
which hydrogen nuclei are stable
hydrogen 1 and 2 only
the primary use of a particle accelerator is to
increase the kinetic energy of a charged particle
radiation is used in the processing of food is intended to
kill microorganisms that are found in the food
which particle can not be accelerated by the electric or magnetic fields in a particle accelerator
neutron
one benefit of nuclear fission redactions is
production of energy
nuclear disintegration of naturally radioactive atoms producing alpha or beta particle or gamma radiation
radio active decay
the dating of geological formations is an example of beneficial use of
radioactive nuclides
as the temperature of a sample of a radioactive element decreases the half life of the element
remains the same
which statement explains why nuclear waste materials may pose a problem
they frequently have long half lives and remain radioactive for brief periods of time
which radioactive isotope is used in geological dating
u-238
