Determine the least common multiple of the charges for each combination of elements in the table. Ignore the plus (+) and minus (−) signs of the charges and just enter numerals. The first row is completed for you.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

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).