The ones that would be sacrificial are; K, Na, Ca, Mg, Al, C, Zn
Chlorine has a smaller atomic size.
Explanation: As you move towards right of the periodic table, the atomic size decreases. This is because the number of protons is increasing towards the right of the periodic table, which applies a greater inward force on the electrons. that is why the elements on the right of the periodic table have a smaller atomic size when compared to the elements on the left. Since chlorine is on the right side of aluminium, it has a smaller atomic size.
Answer:
1. C
2. E
3. F
4. D
5. A
Is it science subject or math
K is more reactive than Cu hope this helps!