• Answer to yesterday’s warm-up:amount remaining = 1/8 = (1/2)^3; 3 half-lives; time needed for decay = (4.46 × 10^9 years)(3) = 1.34 × 10^10 years
  • Half life lab; lab due Monday; see Edmodo (lessons folder) for further instructions
  • Post lab quiz Monday: what did you learn? Definitions; how do nuclides differ from one another?