How do ionic bonds form in binary compounds?

(from discovery education)

Which statement best describes the flow of energy in this scenario

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

How many atoms or molecules are there in a mole of a substance?