During early research in nuclear energy, why were scientists surprised that the products from splitting a uranium nucleus had less mass than the reactants?
Answer
A
They expected that the large release of energy would cause an increase in mass.
B
Up to that time, only chemical changes were known to form less mass than they started with.
C
All known changes always started and ended with the same amount of mass.
D
Other known nuclear changes resulted in the same mass of products as reactants.