Ionic compounds can be made from a metallic ion and a nonmetallic ion. metallic ions (m) are positive (cations). nonmetallic ions (n) are negative (anions). x stands for the number of metallic ions and y stands for the number of nonmetallic ions. for each equation given below, enter the number in the space provided to correctly answer the question.

x(+1M) + (–2N) = 0

What does x have to be?  ⇒ 2

(+2M) + y(–1N) = 0

What does y have to be?  ⇒ 2

x(+2M) + y(–3N) = 0

What do x and y have to be? x =  ⇒ 3

and y =  ⇒ 2

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).