diff --git a/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-08-27 Introduction.md b/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-08-27 Introduction.md
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--- a/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-08-27 Introduction.md	
+++ b/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-08-27 Introduction.md	
@@ -105,3 +105,7 @@ The chart of the nuclides is how we understand chains of decay, and what will tu
 ![[Pasted image 20240827195025.png]]
 [A potentially useful interactive website](https://people.physics.anu.edu.au/~ecs103/chart/)
 
+# Radiation
+Any process that releases energy is referred to as radioactive decay. 
+**Radionuclide** - an unstable nuclide that is going to decay.
+