My son handed me a penny that he found in change. He said it felt lighter than most pennies and is not made of copper. It is very yellow in color. I agree with him that it is lighter in weight than the standard penny. I read that there can be a chemical reaction when copper coins are placed in certain chemicals. Is this common? I attached a couple pics of the coin but the yellowness isn't as obvious in the pictures. 2007 D. Error or a high school chemistry student bored in class?IMG_2103.jpg
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