Use the worked example above to help you solve this problem. The half-life of the radioactive nucleus Ra is 1.6x 10³ yr. If a sample initially contains 3.34 x 1016 such nuclei, determine the following: (a) the initial activity in curies 4.5858e11 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. μCi (b) the number of radium nuclei remaining after 4.5 x 10³ yr 4.75e15 ✔ nuclei (c) the activity at this later time 6.527e10 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. μCi Use the values from PRACTICE IT to help you work this exercise. (a) Find the number of remaining radium nuclei after 3.10 x 10³ yr. N = nuclei (b) Find the activity at this time. R = μCi
Use the worked example above to help you solve this problem. The half-life of the radioactive nucleus Ra is 1.6x 10³ yr. If a sample initially contains 3.34 x 1016 such nuclei, determine the following: (a) the initial activity in curies 4.5858e11 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. μCi (b) the number of radium nuclei remaining after 4.5 x 10³ yr 4.75e15 ✔ nuclei (c) the activity at this later time 6.527e10 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. μCi Use the values from PRACTICE IT to help you work this exercise. (a) Find the number of remaining radium nuclei after 3.10 x 10³ yr. N = nuclei (b) Find the activity at this time. R = μCi
Transcribed Image Text:Use the worked example above to help you solve this problem. The half-life of the radioactive nucleus
226Ra is 1.6x10³ yr. If a sample initially contains 3.34x10¹6 such nuclei, determine the following:
88
(a) the initial activity in curies
4.5858e11 X
Your response differs significantly from the correct answer. Rework your solution from the
beginning and check each step carefully. μCi
(b) the number of radium nuclei remaining after 4.5x 10³ yr
4.75e15
nuclei
(c) the activity at this later time
6.527e10 X
Your response differs significantly from the correct answer. Rework your solution from the
beginning and check each step carefully. μCi
Use the values from PRACTICE IT to help you work this exercise.
(a) Find the number of remaining radium nuclei after 3.10 x 10³ yr.
N =
nuclei
(b) Find the activity at this time.
R =
μCi
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