Two stationary positive point charges, charge 1 of magnitude 3nC and charge 2 of magnitude 1.55 nC are separated from rest at the point midway between the two charges and it moves along the line connecting the two charges

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.