Select all that apply. When the products of a reaction have a lower enthalpy than the reactants .
[ ] The reaction is endothermic.
[ ] The reaction is exothermic.
[ ] The change in enthalpy is positive.
[ ] The reactants lost internal energy.

Iknow the answer is a but i don't know why

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?