Reasons and how we arrange elements according to their positions in the electrochemical series​

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

What overall charge must all compounds have

Explain what happens at the saturation point when adding salt to water at room temperature.