Matter, Atomic Structure, and Bonding: Isotopes

We extended our learning about neutrons yesterday with an lesson about isotopes.  The Lesson 13 PowerPoint explains how certain elements like carbon always contain the same number of protons, but may contain different numbers of neutrons.  Students then practiced calculating the number of protons, neutrons, and electrons on the Lesson 13 Worksheet.  For homework, students should complete questions 1-9 at the end of Lesson 13 in the textbook.  For extra credit, students may earn 10 extra points by researching about one of the elements and compiling their research into an  Element Profile Project (see Chapter 2 Summary page in the textbook for instructions).  An additional 5 points may be earned by adding on a section explaining which isotopes of the selected element are naturally occurring, the proportion of each isotope, and the atomic structure of each isotope (the number of protons, neutrons, and electrons in each isotope).  If an isotope has a particular scientific use, that should also be included.  Remember, no school tomorrow.

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