Which statement about endothermic reactions is true? The reaction container always feels hot.

More heat is given off than is put into the reaction.

The reactants have less heat energy than the products.

Energy from an outside source is continuously being added.

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.