Radioactive elements:
a) Have excess energy in their nuclei.
b) Emit particles and energy.
c) Are trying to become stable elements.
d) All of these.
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d) All of these.
Half-life is defined as what?
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, The time it takes for half the remaining atoms in an amount of a radioactive
element to decay.
The intensity of radiation from the x-ray tube measured at the distance of 40 inches
was 1,000 mR. What will the intensity be if the tube was moved to the distance of 72
inches?
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308 mR
When compared with a beta particle, the alpha particle is what?
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Much larger
The half-life of technetium-99m is 6 hours. How many unstable atoms will remain after
12 hours?
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One fourth of the original amount.
a) Have excess energy in their nuclei.
b) Emit particles and energy.
c) Are trying to become stable elements.
d) All of these.
Give this one a try later!
d) All of these.
Half-life is defined as what?
Give this one a try later!
, The time it takes for half the remaining atoms in an amount of a radioactive
element to decay.
The intensity of radiation from the x-ray tube measured at the distance of 40 inches
was 1,000 mR. What will the intensity be if the tube was moved to the distance of 72
inches?
Give this one a try later!
308 mR
When compared with a beta particle, the alpha particle is what?
Give this one a try later!
Much larger
The half-life of technetium-99m is 6 hours. How many unstable atoms will remain after
12 hours?
Give this one a try later!
One fourth of the original amount.
