What are valence electrons and why are they important to know about for bonding of atoms into molecules?

valence electrons are the electron in an outermost shell of an atom of an element (it is also called the outermost electron).

They are important for bonding because, when you bond two or more atom of an element, it is the outermost electron (valence electron) that will do the sharing of electrons when two atoms are bonded together.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

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).