Answer please, In studying the formation and decomposition of various compounds, Proust interpreted the results to mean that, in the makeup
of compounds,

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

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

може ли да зареждате повече информация, моля

i think it's letter a.