When representative elements form ionic compounds which elements achieve full octets?
metals and nonmetals
nonmetals only
neither
metals only

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.

the dependant variable is spilled water

the independent is the heat