hallar el numero de protones, neutrones y electrones de hierro, molibdeno, yodo, francio, aluminio y plata

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

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.

Air can be considered a mixture. which statement does not explain why?