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48  of 48 How long for Ru-106 (half-life: 1 year) to decay down to 0.50% of its original amount? A. 3.3 years B. 7.6 years C. 140 years D. 2.3 years

48  of 48 How long for Ru-106 (half-life: 1 year) to decay down to 0.50% of its original amount? A. 3.3 years B. 7.6 years C. 140 years D. 2.3 years

Chemistry
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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48  of 48
How long for Ru-106 (half-life: 1 year) to decay down to 0.50% of its original amount?
A. 3.3 years
B. 7.6 years
C. 140 years
D. 2.3 years

47. A scientist is investigating daily changes in tree water absorption in a forest. Which radioisotope below would be most suitable for this?

A. an alpha-emitter with a short half-life
B. a short-lived gamma emitter
C. radioactively labelled water vapor
D. a positron emitter with a short half-life

46. If the half-life of a radioisotope is 1.5 years, the radioactivity remaining in a sample of it after two half-lives is

  0%
  25%
  50%
  75%

45. If only 50% of the original amount of a radioisotope remains,

  half the time has gone by
  after twice that time there will be nothing left
  the radioactivity has reached a safe level
  a half-life has passed
 
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