Question

What will happen when two clouds with unlike charges approaches each other?

Answer 1

When the electron cloud overlap then they form an extremely thin exclusion zone between them, a surface at which both electron clouds disappear. That is the exact opposite of the electron clouds overlapping. In the simplest cases, e.g. two helium atoms at bumping together at modest speeds, the resulting behaviors and shapes of the electron clouds are not all that different from those of two elastic balls getting pushed into each other, although of course the surfaces of electron clouds are a lot fuzzier. 

Answer 2

Answer:

When two objects with opposite charges come close to each other, there is a sudden flow of electricity between them. For example, when two clouds with unlike charges come close to each other, a very heavy current passes through the air; this results in lightning.