What is the order in which electrons start filling the orbitals?

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.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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