2. x-rays result from the decay of an excited nucleus (one which has a higher energy than the usual energy) without changing the mass or atomic number of...
X-rays are fast and and simple method of imaging recommended by most of the doctors nowadays, it is painless and doesn't require much preparation and also doesn't require recovery time after having x-rays. The only time that x-rays become dangerous to a persons health is when they are exposed too much of radiation however, this risk is very low.
