Lead is usually used because of its density and ability to block electromagnetic radiation.
Lead is commonly used for X-Ray shields.
It would be an Other Metal, Lead(Pb).
lead
Lead
The ozone layer shields us from ultraviolet radiation.
Lead is used in the shields at the dentist to stop x-ray radiation used to take pictures of your teeth from passing through the organs in your chest and torso.
Heavy metals as lead retain nuclear radiations.
Ozone shields against incoming UV radiation
It is Lead, Pb plumbus.
It's not dangerous to people on earth, because the atmosphere shields us from the radiation.
hcjfigi
O3, aka ozone.
Ozone
Depleted uranium, which is mostly Uranium-238 is used for shielding gamma radiation. Though it is radioactive, it has a very long half life, and is very effective against gamma radiation. The result is that it makes a pretty good shield.