1. Topic: Half-Life

2. Half-Life
Time required for ½ of any given mass radioactive nuclei to decay
Characteristic for each isotope
Ranges from fractions of second to billions of years
Not affected by chemical or physical environment

3. Half-Life Map 0 1 2 3 4 5 1 1 1 1 1 1 1 2 4 8 16 32 # of half-lives
Fraction mass
remaining

4. half-lives # HL = ___time elapsed___ length of 1 half-life
[add to Table T]