Additional data. You may not need all of it. 1 eV = 1.602 x 10^-19 J 1 MeV = 106

Question

Additional data. You may not need all of it.
1 eV = 1.602 x 10^-19 J
1 MeV = 106 eV
1 u (atomic mass unit) = 1.6605 x 10^-27 kg
Mass - energy equivalence: 1 u = 931.494 MeV
mp= mass of proton = 1.007825 u
mn = mass of neutron = 1.008665 u
me = mass of electron = 5.4858 x 10^-4
u
c = speed of light = 2.998 x 10^8 m s-1
? = Stefan-Boltzmann constant = 5.672 x 10-8 J s-1 m-2 K-4
? = Earth's average planetary albedo = 0.34
rE = radius of planet Earth = 6370 km
Solar constant for Earth: S ? 1370 Wm-2
Nuclear masses :
U-235 235.04392 u
Barium-141 140.91441 u

Plutonium-239 is radioactive and decays via alpha decay. The daughter
product is radioactive and emits an alpha particle, which produces yet another radioactive daughter, and so on
through many stages. The final product of this decay series is a stable isotope of lead, Pb-207.
The entire decay series includes how many alpha decays and how many beta (?-) decays? You may refer to the periodic table handout. Clearly show your work; you will not receive credit for copying the answer from an internet source.

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