QUESTION 15152Eu is a radioisotope with a half-life of approximately 14 years. A student works with a sealed source of 152Eu with a current activity of 1 μCi. Complete the following table.Atomic Number Mass Number Number of Neutrons Half-Life 14 years Current Activity 1.0 μCi Number of Half-Lives between now and 70 years from now Remaining activity 70 years from now (as a percentage) % Report to 2 significant figuresRemaining activity 70 years from now (in μCi) μCi Report to 2 significant figures

The number of the neutron in an element is equal to the difference between mass number and atomic…

Answered: 152Eu is a radioisotope with a…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter25: Nuclear Chemistry

Section25.4: Rates Of Nuclear Decay

Problem 25.6CYU

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QUESTION 15

¹⁵²Eu is a radioisotope with a half-life of approximately 14 years. A student works with a sealed source of ¹⁵²Eu with a current activity of 1 μCi. Complete the following table.

Atomic Number
Mass Number
Number of Neutrons
Half-Life	14 years
Current Activity	1.0 μCi
Number of Half-Lives between now and 70 years from now
Remaining activity 70 years from now (as a percentage)	%	Report to 2 significant figures
Remaining activity 70 years from now (in μCi)	μCi	Report to 2 significant figures

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