Radiometric dating lab pennies
Half-life Pennies period remaining (heads) removed (tails)0 100 01 2 3 4 5 On graph paper provided, graph pennies vs time period.Plot all data and connect them with the best fit line.4) What do the pennies that were tails in the lab represent?To demonstrate that the rates of decay of unstable nuclei can be measured, that the exact time that a certain nucleus will decay cannot be predicted, and that it takes a very large number of nuclei to find the rate of decay.2) If you have 1600 Francium-220 atoms now, how many will you have left after 82.5 seconds?3) What does the shaking of the pennies represent in terms of radioactive decay?Scientists, using rigorous methods have established a process to eliminate this problem by calibrating radiocarbon dating results to items of a known age.In this way, items of unknown age can be tested and an age determined to a reasonable degree of accuracy. More tomorrow where we explore the concept of isochron dating and how it neatly destroys most of the rest of these ‘issues’.
This lesson helps students understand the important notion that neutrons in the nucleus add to an atom's mass.
(Radioactive nuclei will be those candies with the marked side down.) 2.