A redox reaction occurs in an electrochemical cell, where silver (Ag) is oxidized and nickel (Ni) is reduced. i. Write the half-reactions for this reaction, indicating the oxidation half-reaction and the reduction half-reaction.
ii. Which metal is the anode, and which is the cathode?
iii. Calculate the standard potential (voltage) of the cell.
iv. What kind of electrochemical cell is this?
I really cant find a answer and need help pls

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.