Practice Quiz

NAEP Science Grade 12

Category - Science

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X -> Y + Z + energy The equation above represents a nuclear decay, in which nucleus X decays into particle Y and nucleus Z and releases energy. Which of the following can explain why energy is released in the decay?
  1. The mass of X is less than the sum of the masses of Y and Z.
  2. The mass of X is less than the difference between the masses of Y and Z.
  3. The mass of X is greater than the sum of the masses of Y and Z.
  4. The mass of X is greater than the difference between the masses of Y and Z.
Explanation
Answer: C - The mass of X is greater than the sum of the masses of Y and Z.
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