Which two elements are most likely to form a compound? Na and Mg Mg and Ar Na and Ar Mg and S

answer; blank (1); /// (2)///(3)///highblank(4)//low;

yes it is balanced

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.