1. Assume the cubes represent atoms and that all cubes are originally the same type of atom/isotope. As a color is rolled face-up, it is considered to have decayed, to have changed to a new type of atom. Predict the number of throws it will take to reach the half-life for each color, to have half of the cubes removed from the full set of cubes; record this number Predicted Half-life Color (Number of Throws) EI for each different color. 2. Start with red cube data. Roll all cubes and remove the any cubes that have the red side facing up. Record the number of cubes remaining. Continue this process until all cubes have decayed to red (rolled so red is face-up); each roll counts even if no red sides appear. You may not need all 25 rolls in the table and that is ok. 3. Repeat the process with the cubes for the black sides. 4. Repeat the process with the cubes for the white or unpainted sides. Cubes Rolls Red Cubes Rolls Black Cubes Rolls White Cubes (Red) Remaining (Black) Remaining (White) Remaining 0 25 0 25 0 25 1 21 16 12 2 17 2 9 2 4 3 15 3 6 3 3 4 12 4 4 4 2 5 11 5 3 5 6 7 6 2 6 0 7 7 7 7 8 7 8 8 9 5 9 0 9 10 3 10 10 11 3 11 11 12 2 12 12 13 13 13 14 0 14 14 15 15 15