In a chemical reaction, the elements magnesium and chlorine combined to form magnesium chloride (MgCl2). Which statement correctly describes the number of atoms in this reaction? A.
The number of chlorine atoms doubled in the chemical reaction.
B.
There are just as many magnesium atoms after the reaction as there were before it.
C.
The number of magnesium atoms decreased in the chemical reaction.
D.
There are only a third as many atoms after the reaction as there were before it.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

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).