There is no such thing as "normal electron". All electrons are identical. However, depending on what they do, they either will, or will not emit electromagnetic waves. Hence you have to explain "which electron" you mean.
Longer answer is - it again depends. If the electron just occupies its orbital, it doesn't emit anything. If, for whatever reason, it jumps between orbitals - it either emits, or absorbs energy, typically in the form of EM radiation.
Please do some reading on your own before asking overly broad questions here on the PF. We expect folks to put in some effort first to try to answer their own question. Here is a wikipedia page with much of the information you are asking about: