11.1

1.)

a) the wrapped penny was less corroded than the unwrapped penny

b) the protection cam from both the coating and sacrificial techniques because it was coated with steel wool and it was protected by the other penny.

c)  Copper isn't very reactive but iron can be oxidized but this prevents further oxidation because copper can't be oxidized.

2.)   These areas started to corrode because aluminum is higher on table J than iron

3.)    This could have been prevented if the spots were sealed with caulking because it uses the technique of "sacrifice"

4.)

a)  Corrosion is the breaking down of a metal and it is caused by the loss of valence electrons in an element over time.

b) A chemist can outsmart corrosion by coating the metal they need with another metal or the process of "sacrifice"