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24 September, 19:30

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

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  1. 24 September, 23:06
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    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.
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