How many formula units are in 17.55 moles of NaCl2

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Which terms are used to identify pure substances

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.