Ionic compounds tend to form these types of ordered solids

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.