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RADIOACTIVITY-POWERPOINT - Center for Polymer Studies

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Radioactivity
Paul Charpentier
Foxboro High School
Foxboro, MA
pcharp@massed.net
Patricia Brandl
Medford High School
Medford, MA
Pattygrace1@aol.com
Traditional Coverage
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Review of atomic structure
Comparison of radioactive emission
processes
Transmutation reactions
Half-life
Enhancement to Curriculum
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Allows students to observe simulated
decay of atoms in real time
Activity emphasizes random nature of
radioactive decay
Intended Audience
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Standard (college-prep) one-year chemistry
course
Unit includes enrichment aspects for honorslevel classes
Aligned to Massachusetts Science
Frameworks (Chemistry 2.3, 2.8, 2.10, 2.11)
and MCAS
Possible interdisciplinary aspects with Social
Studies
Adaptations
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Simulab also appropriate for
demonstration use
Conceptually, can be used by Freshman
Physical Science courses
Placement in the Curriculum
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Includes enhancement for a traditional
unit which is done after the Atomic
Structure Unit
SimuLab will follow traditional hands-on
simulation of half-life
Reviews/reinforces graphing skills
Resources
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Classroom Facilities:
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Wet lab materials, Geiger counter, radioactive
sources (Uranyl acetate, Thalium, Coleman lantern
mantles)
Computer Resources:
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Demonstration-use: PC with computer projector
Computer-Lab: one machine per 2 students,
(teacher PC with computer projector, optional)
General Goals and Objectives
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Student will compare and contrast the
three products of radioactive decay (a,
B, g)
Predict the products of transmutation
reactions and balance accordingly
Describe the randomness and fixed rate
at which isotopes decay
Instructional Activities
Nuclear reactions
• Graphical Organizer
of Decay Modes
• Shielding Geiger
Counter Demo
• Cloud Chamber
Demo
• Writing Nuclear
Reactions
Half-Life
• Sweet Decay Lab
• Half-Life SimuLab
• Half-life Problem
Solving
• Carbon-14 dating
Chronological Outline
Day 1: Graphical Organizer of Decay
Modes (a, B, g)
Day 2: Demos: Demo Shielding with
Geiger Counter, Cloud Chamber
Day 3: Writing Nuclear Reactions (review
isotope symbolism) to illustrate kinds of
transmutation
Chronological Outline (cont.)
Day 4: Sweet Decay Lab
Day 5: Half-life SimuLab
Day 6: Social Issues: Carbon-14 Dating,
Nuclear Waste Disposal
Day 7: Assessment
Assessments
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Rubrics for wet lab and SimuLab
Rubric for demonstration
Nuclear equation/half-life problem
session
Traditional teacher-generated test/quiz
Optional social studies tie-in (social
issues) research project
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