Half-Life
Half-Life Time required for ½ any given mass of radioactive nuclei to decay Characteristic for each isotope Ranges from fractions of second to billions of years NOT affected by chemical or physical environment of nuclide
Half-Life Map 1 ½ ¼ 1/81/161/32 0 1 2 3 4 5 Fraction Remaining # of Elapsed Half-lives 0 1 2 3 4 5 multiply by fraction Minitial Mfinal multiply by denominator or
No. of half-lives Number of half-lives = ____time elapsed__ length of 1 half-life Look up half-lifes in Table N