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which particle has the least mass?

Beta particle

The purpose of the high density concrete used in some nuclear reactors is to

-shield the reactor walls from radiation damage -shield the reactor personnel from radiation exposure -control the rate of the nuclear reaction -control the speed of the neutrons

Which isotope is most commonly used in the radioactive dating of the remains of organic materials?

14C

what is evidence that gamma radiation has greater penetrating power than alpha or beta radiation?

54 alpha beta can't penetrate but gamma can

Which emission causes the atomic number of a nuclide to decrease by 2 and its mass number to decrease by 4?

An alpha particle

This fission process in a reactor can be regulated by adjusting the number of neutrons available. This is done by the use of what

control rods

The radioisotope I-131 is used to

diagnose thyroid disorders

during a nuclear reaction, mass is converted into..

energy

Which risk is associated when using nuclear fission to produce energy in a power plant?

exposure of workers to radiation

Which type of reaction produces energy and intensely radioactive waste products?

fission of uranium

nuclear FUSION differs from nuclear FISSION because nuclear fusion reactions..

form heavier isotopes from lighter isotopes

which particle has the greatest penetrating power through a shield?

gammas

which phrases describe a risk of using the radioisotope C-60 in treating cancer?

increased biological exposure

what is a problem commonly associated with nuclear power facilities?

it is difficult to dispose of wastes

How is the nuclear waste from nuclear power plants disposed of?

its taken to a landfill

radiation used in the processing of food is intended to...

kill the microorganisms that are found in the food

A particle accelerator is used to provide charged particles with sufficient...

kinetic energy to penetrate a nucleus

When an atom emits a beta particle from its nucleus, the resulting nucleus contains one...

less proton and the same number of neutrons

which components of a fission reactor are used to slow neutrons during a fission reaction?

moderators

a serious risk factor associated with the operation of a nuclear power plant is the production of..

radioisotopes with long half-lives

As a sample of a radioactive element decays, its half-life..

remains the same

The term radioactivity refers to the...

spontaneous disintegration of certain atomic nuclei

a radioactive isotope contains nuclei which..

spontaneously change, liberating energy

a radioisotope which is sometimes used by doctors to pinpoint a brain tumor is,,

technetium-99

Elements are radioactive if...

their atomic nuclei are unstable

Why do radioactive elements decay?

their nuclei are unstable

In which reaction is an atom of one element converted into an atom of another element?

transmuation

Which radioactive isotope is used in geological dating?

uranium-238

A radioisotope is called a tracer when it is used to

Determine the way in which a chemical reaction occurs

The largest nuclear disaster in history occurred in...

Fukushima, Japan

Which nuclear emission has no charge and no mass?

Gamma ray

Radioisotopes used for medical diagnosis must have..

Short half-lives and be quickly eliminated by the body


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