Lesson Plan Day: 42          10/22

Teacher: P. Kirk

Subject: Science

Course: Chemistry


Structure of the nucleus and the "loss" of mass caused as nuclear matter is converted to binding energy.

Stable and unstable ratios of protons and neutrons. 

How nuclear reactions affect the nucleus of an atom. 


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.

Section 21.1: Nuclear reactions affect the nucleus of an atom.


Define the structure of the nucleus of an atom. Define and calculate binding energy. Use the Isle of Stability to determine stable and unstable ratios of protons and neutrons.

Using nuclear notation to explain the changes in a nuclear reaction.  and the "loss" of mass caused as nuclear matter is converted to binding energy. Determine to products of nuclear reactions and nuclear decay.


nucleon, nuclide, mass defect, binding energy, shell model, magic number, nuclear reaction, transmutation 


S will work alone or in small groups to complete 21.1 Study Guide and the Nuclear Decay worksheet. S will observe and participate as T goes over Alpha Decay and Beta Decay PHeT Simulations.  

S will work in small groups to complete Small Scale Lab: Radioactivity and Half-lives. Most students will learn over the next several days the halfing method of determining ending mass. Classes math capable will use the half life formula to determine starting and ending masses


T will use three PHet Simulations over the next few days to demonstrate decay, types of particles, parent and daughter nuclei as well as nuclear reactions.

T will go over sample problems from Nuclear Decay and may ask S to complete nuclear equations projected or written on board. T will monitor student progress on the worksheet and determine which if any problems are to be collected for evaluation and on what date they will be due.  

T will introduce and lead students through the Small Scale Lab: Radioactivity and Half-Lives. It will be necessary to show them the process of half-life and depending on time and student ability demonstrate half life determination and/or calculation. 5th period will likely be the only class to go over calculations or have students actually calculate half-life. It is no longer a required topic.


21PPT, online printable notes, 21.1 Study Guide, 21 Schedule, 21 Key Terms, Radioisotopes resource page, periodic tables and calculators.   

Nuclear Decay worksheet. Small Scale Lab: Radioactivity and Half-Lives papers and materials.


Students will submit for grading the 21.1 Study Guide and define the Key Terms for the chapter. Formative assessment will be done as T monitors and assists students.

Formative assessment by going over sample problems and Summative assessment by possibly collecting selected Nuclear Decay worksheet problems are suggested.


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Last modified: 08/13/19