An atom’s oxidation number changes from –2 to –5. Was the atom oxidized or reduced, and how many electrons were required for the change? A. Oxidized, 2 electrons
B. Oxidized, 3 electrons
C. Reduced, 2 electrons
D. Reduced, 3 electrons
E. None of the Above

d.) circle motion requires a force to give it a centripetal acceleration.

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).

it takes on an electronical energy