According to model 1 how many atoms of hydrogen and oxygen are in 1 molecule of water

Describe the interaction that occurs between two objects with the same electrical charge.

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.