A sample of NH3(g) and O2(g) are placed in a rigid container. When the equilibrium below is established, the partial pressure of H2O(g) is 0.784 atm. What is the partial pressure of NO(g) when the system is at equilibrium?

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals