7.5 Radioactive Dating Clicker Q (Jan. 20).pdf - TY ER SI O F YO R K U N IV When we first start there's only radioactive Ni none of it has decayed to Cu

7.5 Radioactive Dating Clicker Q (Jan. 20).pdf - TY ER SI O...

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Unformatted text preview: TY ER SI O F YO R K U N IV When we first start, there's only radioactive Ni; none of it has decayed to Cu, so 100% of our Ni is in our sample. Here we've shown this as a ratio between Ni and Cu over time. IB U TI O N .P R O PE R TY After 100 yr, half of our Ni sample has decayed and formed radioactive Cu. We show this as having equal amounts of Ni and Cu (1:1). N O T FO R SA LE O R D IS TR After another 100 yr, our Ni sample is now 1/4 of it's original amount, and the other 3/4 has decayed to Cu. We show this ratio as 1:3 - thus, Ni represents 1/4 of the sample (add the 1 and 3 together to get the total number of "parts") ...
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