Select all the correct locations on the image. Which elements are diatomic?

He, N, F, Mg, S, Ar, I

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

i do not get it   at all

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.