What role does activation energy play in an exothermic reaction? can someone pls help me w this :)

Drive down any three characteristic of modern periodic table

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

Why is the structure of molecule important to its function?