A radioactive isotope is
A) an unstable nucleus that gives off radio waves
B) a nucleus that formed from the fusion of two other nuclei
C) a stable nucleus that is formed from the fission of a large unstable nucleus
D) an unstable nucleus that spontaneously decays to produce high-energy particles and radiation
Correct Answer:
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Q22: Mineralogical analysis of a rock can tell
Q23: In alpha decay,
A) a proton turns into
Q25: In which type or types of radioactive
Q26: The radioactive isotope 226Ra (atomic number 88)
Q27: What do we mean by the half-life
Q32: The radioactive isotope 7Be (atomic number 4)
Q34: The radioactive isotope 131I (atomic number 53)
Q35: A fossil is found in a layer
Q40: In beta decay,
A) a neutron turns into
Q51: A radioactive isotope with an atomic number
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