Lesson Plan Day: 38        10/15


Teacher: P. Kirk

Subject: Science

Course: Chemistry

Topic: Isotopes, differences in mass and different numbers of neutrons, abundance



C.PM.1: Atomic structure - Evolution of atomic models/theory

HS.PS1.C: Nuclear Processes
Nuclear processes, including fusion, fission, and radioactive decays of unstable nuclei, involve release or absorption of energy. The total number of neutrons plus protons does not change in any nuclear process. (HS-PS1-8)
Section 21.1: Nuclear reactions affect the nucleus of an atom.
Section 21.4: Nuclear Fission and Nuclear Fusion


Learn what is different about isotopes of the same element. Define and calculate abundance, average atomic mass and the number of neutrons in a specific isotope.  


 isotope, abundance, relative abundance, mass number, neutron



Students will work alone or in small groups to complete the Average Atomic Mass Packet. If students need additional work or practice they should work on and turn in Average Atomic Mass Practice Problems (Skill Practice 9).

Students will use the PhET-Isotopes and Atomic Mass simulation to complete the PhET handout.

Students will work on and check answers with the Atomic Structure / Isotopes and Average Atomic Mass practice worksheet. 


Teacher will if necessary go through notes covering isotopes, and the calculation of average atomic mass. Assist students work, possibly going through a problem or two on the Skill Practice 9 worksheet.

Monitor student progress on the simulation. Assist where necessary. This one will be a bit more challenging for them. Many lack the math skills to calculate abundance and number of a specific isotope.  


Copies of Average Atomic Mass Packets, Skill Practice 9 worksheet, PhET-Isotopes and Atomic Mass handout, calculators, Notes and PowerPoints on the topic,



The packet should either be graded for completion 5 to 10points or for correctness 15 to 20points.  The Skills Practice 9 worksheet could be collected for 10points or taken as 5 extra credit points from those that do it. 

The PhET packet can be checked, answers can be given or it can be collected for a grade of maybe 10points.


  [ Home ]

Send mail to pkirk@fairborn.k12.oh.us with questions or comments about this web site.
Copyright 2001 Fairborn High School Chemistry Web Site
Last modified: 08/13/19