On the Activity Series of metals what would nickel be considered?

Question

I'm doing this experiment and i have to write down the order from least to most reactive. The experiment consisted of 4 cups with vinegar and each cup had a metal in it. Metals were: galvanized nail, steel nail(iron), nickel and a penny. I had to watch over the next few days as to what happens to the 4 metals.

Answer 1

Let me tell you a wonderful source: the Table of Standard Reduction Potential.
Well, the surface of galvanized nail is Zn. Steel nail can be considered as Fe, nickel is Ni and penny can be considered as Cu. The order is Cu < Ni < Fe < Zn