Lesson Plan Day: 43
Teacher: P. Kirk
Radioactive decay leads to more stable isotopes. During decay particles and
energy are released.
Half-life is the time needed for one half of an amount of radioactive
material to decay.
Radioactive nuclides become stable through a series of decays.
Nuclides can become radioactive naturally or artificially.
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.
Be able to complete nuclear reactions determining decay particles and
energy are released. Learn why natural decay occurs and why several
decay steps may be necessary to reach a stable product. Understand the general
process of transmutation. Use the concept of half lives to determine or
calculate the amount of ending radioactive material at a given time.
radioactive decay, nuclear radiation, radioactive nuclide, alpha particle,
beta particle, positron, electron capture, gamma ray, half-life, decay series,
parent nuclide, daughter nuclide, artificial transmutation, transuranium
S will read and take notes on 21.2 from PPT, text and available printable
notes. S will work alone or in small groups to complete Study Guide
21.2. S will examine the resource Radioisotopes. S will begin Chapter 21 Key
S will observe and participate as T leads them through the Small Scale Lab
demonstrating the half-life process over the next day or two.
S will watch the cloud chamber video and ask questions of T or answer T's
questions during and after the video.
T will go over 21.2 PPT and monitor students as they work to complete Study
Guide 21.2 and Key Terms. T may point out notable radioisotopes and uses to
peak S interest and familiarity with the concepts and vocabulary. T will copy
and distribute Study Guide 21.2 and the Schedule/Key Terms pages along with
T will use the Alpha and Beta Decay simulations in class with students,
guiding their experience and the discussion.
T will show the YouTube video about the natural decay process as shown in
the Large Cloud Chamber at the German Museum of Natural History. Answer or ask
questions pertaining to the video and the decay process. Make sure to stress
that that kind of decay is going on around us at all times.
21PPT, online printable notes, 21.2 Study Guide, 21 Schedule, 21 Key Terms,
Radioisotopes resource page, periodic tables and calculators.
Online YouTube video of the natural decay process in the Large Cloud
Chamber at the German Museum of Natural History.
Students will submit for grading the 21.2 Study Guide and define the Key
Terms for the chapter. Formative assessment will be done as T monitors and
Since the Small Scale Lab may be entirely done as a class no grade will
likely be taken. A performance and or participation grade might be possible.