Nuclear bomb.The most horrifying mass destructive weapon ever to be produced.But do you know how it works?It works by the combined action of particles called atoms which are so tiny that we can't see even with a microscope.In the center of the atom, there is a shell named nucleus which contains the particles protons and neutrons.Some of the atoms are radioactive.That means the continuous emission of smaller particles.When a radioactive element such as Uranium-235 is splitted by a single neutron(it has no charge),a vast amount of energy is released.This energy can destroy an area of about 25 km.