Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 4, Problem 4.7P
To determine

The number of atoms in 210Po.

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Calculate the mass defect (in kg) of 150Nd if it has an observed atomic mass of 149.9208 amu. The mass of a proton and a neutron are 1.0078 and 1.0087 amu, respectively. Express your answers in three decimal places in scientific notation, i.e., 6.022e26 to represent 6.022x1020. No need to include negative sign and units.
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A sample of radioactive material is obtained from a very old rock. The activity of the rock over a period of time is monitored, and lnA is plotted as a function of t such as in Figure (b). The slope of the line has a value of -6.1 ×10^−8y^−1.   FInd the half-life in years.
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