What product is formed when 
undergoes 2 alpha emissions and 2 beta emissions in a total of four steps?
A) actinium-227
B) thorium-227
C) thorium-231
D) polonium-231
E) radon-227
Correct Answer:
Verified
Q59: Select the most stable isotope from the
Q60: The half-life of iodine-131 is 8.1 days.
Q61: Which of the following isotopes would be
Q62: The reaction Q63: Carbon-14 has a half-life of 5730 yr. Q65: Carbon-11 radioactively decays by positron emission with Q66: Which of the following statements regarding the Q67: Carbon-14 has a half-life of 5730 yr. Q68: Carbon-11 radioactively decays by positron emission with Q69: Why is radon gas dangerous?
A)It reacts chemically
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