Why were pennies changed from all copper to copper plated zinc?
Answers
Answered by
0
Penny's we're first made up of copper but later on 1857one king changed the copper but
u adding zinc to it then many told that it was tin cans
Answered by
0
Answer:
Explanation:
when copper is exposed to moist air containing co2 it becomes green in colour thus zinc is coated over it as it does not react with the atmosphere and protect the copper .
Similar questions