Ella wants to construct an electrochemical cell . A major material needed is a copper strip.
Ella doesn't have this material.
What else can she use.

Note : The copper strip is meant to act as the cathode ( where reduction takes place ).
Reduction = Gain of electrons.

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Can someone me with questions 15 to 17 plz.

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.