Transcript Document
The splitting of nuclei is _______________.
What unit(s) are used to measure radiation dose?
Radiation that produce an electric current can be measured with what type of counter?
PET scans measure blood flow in what part of the body?
Alpha particles have a _____ charge.
Gamma rays have a _____ charge.
What is the reason for the decay of naturally radioactive elements?
a.
To reduce the number of neutrons as the elements lie above the band of stability.
b.
c.
d.
To reduce the number of protons as the elements lie below the band of stability.
To reduce the number of either neutrons or protons to lie in the band of stability.
To release the energy from nucleus in the form of gamma radiation.
Unstable nuclei can break apart spontaneously, changing the identity of the _____ .
a.
elements b.
c.
d.
atoms compounds reactions
The combining of nuclei is ________________.
Why are boron or cadmium rods used in a nuclear fission reactor?
a.
to absorb the alpha emission b.
c.
d.
to absorb the neutrons produced to protect people from radiation to provide chemical combustion
The amount of radiation from natural radioactivity is about _____ times higher than the amount you receive from a dental x-ray.
a.
b.
10 100 c.
d.
1,000 10,000
Which type of radiation is the most penetrating?
a.
alpha b.
c.
d.
beta gamma all three are essentially equal
Beta particles have a _____ charge.
What is the product of beta emission from a radioactive isotope of lead?
Why are cadmium or boron rods used in a nuclear fission reactor?
a.
To absorb the alpha emission.
b.
c.
d.
To protect people from radiation.
To provide chemical combustion.
To absorb neutrons produced.
State two main reasons why fusion reactions are not yet commercially viable.
A radioactive compound has a half-life of 234 years. What will be the amount remaining in a 250-gram sample after 27 years?
Bismuth-209 undergoes radioactive decay, and polonium-209 is formed. What type of radioactive decay occurred?