What do we mean by the half-life of a radioactive isotope?
A) it is the amount of time a person can be exposed to radiation without getting sick
B) it is the time for half the number of radioactive nuclei to become stable nuclei
C) it is the amount of time for half of the nuclei to become radioactive
D) it is the time for half the number of radioactive nuclei to decay
Correct Answer:
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Q47: If originally there were X atoms of
Q48: A rock sample contains 1/8 micrograms of
Q49: Radioactive decay is
A) deterministic
B) relativistic
C) atomistic
D) probabilistic
Q50: A rock sample contains 1/2 microgram of
Q51: A radioactive isotope with an atomic number
Q53: A rock sample contains 1/4 micrograms of
Q54: If originally there were X atoms of
Q55: The radioactive isotope ⁷Be (atomic number 4)
Q56: Which type or types of rock cannot
Q57: A radioactive isotope with an atomic number
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