first, third, fourth, second
Answer: Ozone in the stratosphere is made up of three (3) oxygen atoms while Oxygen we breathe consists of two (2) atoms
Explanation: Oxygen in the atmosphere is a diatomic molecule, this means it is made up of two oxygen atoms. Ozone is a blue gas with a pungent odor, it is a triatomic molecule, this means it is made up of molecules containing three oxygen atoms. Ozone protects living organisms by preventing ultraviolet rays from reaching the Earth's surface.
Gamma rays<span> and beta particles are all </span>used<span> to treat internal organs. X-</span>rays<span> are produced by firing electrons at a metal target and </span>gamma rays<span> are emitted by the nucleus of radioactive atoms. </span>Gamma rays<span> are </span>used<span> to kill cancer cells, and to </span>medical<span> equipment and in radioactive tracers.</span>