Why is the combination of two protons and two neutrons stable, but two protons and one neutron is not?
A) There are not enough neutrons to overcome the electrical repulsion of the protons.
B) There are not enough neutrons to overcome the nuclear repulsion of the protons.
C) The nuclear attraction between protons is greater than that between neutrons.
D) The electrical repulsion between the two protons is greater in one case than the other.
E) none of the above
Answer: A
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