If an decrease in temperature accompanies a reaction, what occurred?

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

How many moles of al3+ ions are in 1.25 moles of al2o3