SEP Develop a Model Write the skeleton equation for the reaction of iron and diatomic oxygen gas to form iron(II)oxide (Fe, O2). Sketch a molecular model of the reactants and products in the reaction.

i'm pretty sure its b i might be wrong though!

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).