How do rocks get moved from one place to another

Based on the equation and the information in the table, what is the enthalpy of the reaction?

State one important difference between a physical change and a chemical change?

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