# Unit 3: Basic Atomic Theory & Science

Learning Objectives: ANSI/ASNT CP-105- 2016 Section 2,3, 5 & 6

Upon completion of this unit, the student will be able to define and understand the following:

- Review of Units 1 & 2
- ALARA
- Radiation Intensity units

- Time, Distance & Shielding…
- More Science: (2.0 Fundamental Properties of Matter)
- Isotopes
- Stable vs. Unstable atoms
- Radioactive half-life
- Radioactive Decay
- Specific Activity
- Fission
- Fusion

- More Math:
- Inverse Square Law
- Calculating Half-Life and Activity of Gamma Sources

**Learning Activities:**

- Lecture and discussion

**Learning Resources:**

- Units of measurement handout
- Glossary

**Evaluation:**

- Inverse SQ. Law Worksheet #1
- Article Review #4