40 The half-life of a radioactive isotope is 693 s.Which of the following is the probability that a nucleus of the isotope will decay in the next second? A A 1/1000 B 1000 C 1000 In2 D 1/1000 In2 相关知识点: 试题来源:
If the half-life of a given substance is 60 days, how long will it take for a 30 gram sample of the substance to decay until there is only 7.5 grams of the radioactive material remaining? If uranium-238 has a half-life of 45 billion year...
<p>To solve the problem of finding the time taken between 40% decay and 85% decay of a radioactive substance with a half-life of 30 minutes, we can follow these steps:</p><p><strong>Step 1: Understand the Decay Process</strong> The half-life of a radioac
A radioactive source has a half-life of 6 days.How long will it take for the count rate to fall from 180 per minutes to 145? The half-life of iodine-131 is 8.04 days.On a certain day,the activity of an iodine-131 sample is 6.64...
radioactive half-life [¦rād·ē·ō′ak·tiv ′haf‚līf] (chemistry) half-life McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. Want to thank TFD for its existence?Tell a friend about us, add a link to this page,...
The half−life periof of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to View Solution Free Ncert Solutions English Medium NCERT Solutions NCERT Solutions for Class 12 English Medium NCERT Solutions for Class 11 English Medium ...
Determination of the half-life of Ra226 has great value because of the wide use of this isotope as a radioactive standard in medical therapy, in industry, and in the preparation of neutron sources. This paper presents both data from the literature and original experimental work concerning the ...
(1)The half-life of cesium-137 is 30 years. Suppose we have a 10-g sample. ①Find a function that models the mass remaining after t years. ②How much of the sample will remain after 80 years? ③After how long will only 2 g of the sample remain?
Wertichad Museries Find the half-life of a radioactive substance that decays by 3% in 8 years. (Round your answer to one decimal place.) yr he radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample...
The term half-life is appropriate due to the exponential and quantum nature of radioactive decay, which makes it impossible to predict exactly when a single atom of radioactive material will disintegrate. The half-life measurement instead relates to stat