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Mass Number: In 1982, the United States government changed the way it minted pennies. Before 1982, pennies were made of 95% copper and 5% tin. Now they are.
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Isotopes of Pennies Name ___________________________Date ______________ Period _______ Pre-Lab Questions You will do a lab that will deal with isotopes, mass number, and atomic mass. Before you begin your work in the lab, try to explain these terms in your own words. After you have finished the lab, you will have a chance to revise your explanations based on what you have learned in the activity.
Isotope: Atomic Number: Mass Number: In 1982, the United States government changed the way it minted pennies. Before 1982, pennies were made of 95% copper and 5% tin. Now they are made of zinc coated with copper. Because they weigh different amounts (have different masses), we can call them isotopes of pennies.
Smile! ☺You have completed the activity portion of this lab. Now, you need to complete the “Applying What You Have Learned” section on the last page. Applying What You Have Learned: