What are the coefficients that would balance the chemical equation below? Mg + H3PO4 -> Mg3(PO4)2 + H2
O 3, 2, 1,3
O 3, 2, 2, 3
O 1, 1, 1, 1
O 6, 4, 2, 6

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.