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List 2 physical properties that can be used to differentiate between a Cu ( before 1982) penny and a Zn (after 1982) penny.

User Ben Avnon
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1 Answer

2 votes

Answer -green

- and visibly more brittle

Explanation: Your penny would turn green from oxidation, and the more oxidation there is the more brittle and rubbed off the imprint will be.

User Haocheng
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