Although most natural potassium nuclei are stable 39K (93.3%) or 41K (6.7%) nuclei, about 0.0117% are radioactive 40K nuclei, which have a half-life of 1.26 billion years. If you were worriedabout 4°K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait?time to wait =yearsce is +/-2%Jm/s

Potassium exists in nature in form of two isotopes : 1. 39K ; Abundance = 93.3 % 2. 41K ; Abundance…

Although most natural potassium nuclei are stable K (93.3%) or **K (6.7%) nuclei, about 0.0117% are radioactive *°K nuclei, which have a half-life of 1.26 billion years. If you were worrie about 40K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait?

Although most natural potassium nuclei are stable K (93.3%) or **K (6.7%) nuclei, about 0.0117% are radioactive *°K nuclei, which have a half-life of 1.26 billion years. If you were worrie about 40K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by uranium/lead dating. Assuming that the rock did not contain any lead when it was formed, what is the current mass of Pb206 in the rock, if it currently contains 1.430 g of U238? The half-life of U238 is 4.47×109 years.
Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by β– emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many protons and neutrons does the 106Ru nucleus contain? Identify the missing daughter nucleus in the β– emission decay of 106Ru below. How many years after 106Ru is implanted in the eye does it take for its decay rate (or activity) to be reduced to 27.5% of the initial decay rate? Use 1 year = 365 days.
The radioactive isotope has a half life of 96.7 minutes. How long will it take for the radiation from a 450 pCi sample to decrease to 28 pCi?
The radioactive isotope 212pb has a half-life of 10.64 h. A sample containing this isotope has an initial activity (t = 0) of 55.0 pCi. Calculate the number of nuclei that decay in tl time interval between t, = 7.0 h and t, = 15.0 h. nuclei
What is the half‑life of an isotope that decays to 3.125%3.125% of its original activity in 41.8 h?