What will happen as the excited electron of arsenic atoms return to lower energy levels?

Atoms will be split into hydrogen and oxygen.

A deep blue solution will be formed.

Light will be given off.

It will create a small explosion.

Question

What will happen as the excited electron of arsenic atoms return to lower energy levels?
		
Atoms will be split into hydrogen and oxygen.
		
A deep blue solution will be formed.
		
Light will be given off.
		
It will create a small explosion.

anonymous · Answer

What do you think?  Can you eliminate answers, meaning identify answer that are for sure wrong?

I'm rephrasing your question.  What happens when something goes from a higher energy state to a lower energy state?