EX-1: Calculate the half-life of X-226 if 1 g of it emits 1Ci alpha Particles persecond.EX-3: Co-60 decay to give Ni-60. Calculate the fraction and the percentage of thesample that remains after 15 years. The decay constant of Co-60 is 0.13 y.EX-6: A sample of radioactive l-133 gave with a Geiger counter 3150 cpm at acertain time and 3055 cpm after one hour later. Calculate the half-life of I-133.

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EX-1: Calculate the half-life of X-226 if 1 g of it emits 1Ci alpha Particles per second.

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...

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.

Question

EX-1: Calculate the half-life of X-226 if 1 g of it emits 1Ci alpha Particles per
second.
EX-3: Co-60 decay to give Ni-60. Calculate the fraction and the percentage of the
sample that remains after 15 years. The decay constant of Co-60 is 0.13 y.
EX-6: A sample of radioactive l-133 gave with a Geiger counter 3150 cpm at a
certain time and 3055 cpm after one hour later. Calculate the half-life of I-133.

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The Cs-131 nuclide has a half-life of 30 years. After 120 years, 2.5 g remain. What is the original mass of the Cs-131 sample in grams?