What is the most available explosive agent?

The appropriate response is Nitroglycerin. It is outstanding for its touchy properties and remains a dynamic fixing in the making of explosives, for example, explosive. It sleek, dry fluid, additionally a high dangerous that is unstable to the point that the smallest shock, effect or contact can make it suddenly explode.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.