Multiple Choice
Plutonium-239 decays into uranium-235 plus an alpha particle. The energy released in the process is 5.24 MeV. Given the following mass values
He: 4.002603 u 
U: 235.043924 u
What is the mass of 
Pu in atomic mass units? (1 u = 931.494 MeV/c2)
A) 239.05215 u
B) 239.02775 u
C) 239.00189 u
D) 238.99919 u
E) 238.98884 u
Correct Answer:

Verified
Correct Answer:
Verified
Q12: Today,the uranium found on Earth contains 0.720%
Q20: Going from medium mass nuclei to heavy
Q23: Fermium-253 has a half-life of 3.00 d.A
Q41: Rutherfordium-261 has a half-life of 1.08 min.How
Q43: Consider the short-lived neutral isotope represented by
Q44: The decay rate of an isotope is
Q45: A radioactive atom has 98 protons and
Q48: An ancient rock is found to contain
Q53: A radioactive isotope decays by β<sup>-</sup> emission
Q87: If a nucleus decays by gamma decay