What material stops radiation and how does it provide protection?

Lead is a common material that stops radiation because it is dense and has a high atomic number, which helps absorb and block the radiation particles. When radiation passes through lead, the atoms in the material interact with the radiation, causing it to lose energy and reduce its harmful effects on living organisms. Lead shielding provides protection by creating a barrier that limits the amount of radiation that can pass through, reducing exposure and potential damage to tissues and cells.