Topic: Half-Life

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

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 0 1 2 3 4 5 1 1 1 1 1 1 1 2 4 8 16 32

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