An x-ray technician will place a lead cloth over parts of your body when taking an x-ray to protect your cells from being damaged. This is due to the reason that x-rays have the potential to harm our body.
X-rays have shorter wavelength while radio waves have a longer wavelength. Also, the frequency of x-rays are more and the radio wave is less.
Since energy is directly proportional to frequency, so x-rays carry more energy which transferred to our body.
When the human body is directly exposed under x -rays, the electrons of x-rays strikes and due to this our DNA chains can break. This can leads to cancer.
Radio waves can harm people, but due to the wavelength of the X-Rays which are extremely dangerous to humans, and the wavelength of Radio waves (which are calm compared to the way X-Rays look) compared side by side, it would take extensive exposure to the Radio waves to cause disease, cancer, or even death. Hope I helped!
if you search up the periodic table and go to any website it will let you press on the element and it will say if it is a gas,solid or liquid and it might say if it is man made!