Radioactivity Basics: The isotope 
U is radioactive and decays in a series to 
Th. In this series, the particles ejected from the nucleus are
A. one alpha particle and three beta-minus particles.
B. three alpha particles and one beta-minus particle.
C. one alpha particle and four beta-minus particles.
D. four alpha particle and one beta-minus particle.
E. two alpha particles and two beta-minus particles.
Answer: E
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A) 0.079 B) 0.026 C) 0.26 D) 0.79 E) 2.6
Iron does not release energy when it is fused.
Answer the following statement true (T) or false (F)
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A) zero B) half the sum of their original momentums C) twice the sum of their original momentums D) need more information