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Chapter 21: Problem 85

What is the difference between a level of radioactivity and a dose of radioactivity?

Short Answer

Expert verified
The level of radioactivity refers to the amount of radioactivity present in a material or substance, while a dose of radioactivity refers to the amount of ionizing radiation absorbed by a person or object. The level of radioactivity is determined by the number of radioactive atoms present and their decay rate, while the dose takes into account factors like exposure time and shielding. In summary, the level of radioactivity describes the amount of radioactivity in a source, while the dose of radioactivity provides an indication of the potential risks and damage associated with exposure to ionizing radiation.

Step by step solution

01

Understanding Level of Radioactivity

The level of radioactivity refers to the amount of radioactivity present in a material or substance. It is determined by the number of radioactive atoms present and the rate at which they undergo radioactive decay. Radioactivity levels are often measured in units such as becquerels (Bq), which represents the number of atomic disintegrations per second.
02

Understanding Dose of Radioactivity

A dose of radioactivity, on the other hand, is a measure of the amount of ionizing radiation absorbed by a person or object. The dose takes into account the level of radioactivity, exposure time, and shielding factors. It is an indication of the potential damage caused by the ionizing radiation. Common units of dose measurement include sievert (Sv) and Gray (Gy).
03

Difference between Level and Dose of Radioactivity

The main difference between the level of radioactivity and the dose of radioactivity lies in the context in which they are used. The level of radioactivity describes the amount of radioactivity present in a source, not considering any potential impact on people or objects. In contrast, the dose of radioactivity specifically takes into account exposure to radiation, shielding, and other factors, providing an indication of the potential risks and damage associated with exposure to ionizing radiation.

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Most popular questions from this chapter

In 2006 an international team of scientists confirmed the synthesis of a total of three atoms of Og (oganesson) in experiments run in 2002 and 2005. They bombarded a \(^{249}\) Cf target with \(^{48}\) Ca nuclei. a. Write a balanced nuclear equation describing the synthesis of \(_{118}^{294} \mathrm{Og}\) b. The synthesized isotope of Og undergoes \(\alpha\) decay \(\left(t_{1 / 2}=0.9 \mathrm{ms}\right) .\) What nuclide is produced by the decay process? c. The nuclide produced in part b also undergoes \(\alpha\) decay \(\left(t_{1 / 2}=10 \mathrm{ms}\right) .\) What nuclide is produced by this decay process? d. The nuclide produced in part c also undergoes \(\alpha\) decay \(\left(t_{1 / 2}=0.16 \mathrm{s}\right) .\) What nuclide is produced by this decay process? e. If you had to select an element that occurs in nature and that has physical and chemical properties similar to Og, which element would it be?

In Section 21.6 we state that "no energy would be released if two \(^{4} \mathrm{He}\) nuclei were to fuse together to form \(^{8} \mathrm{Be}\). Similarly, \(^{8} \mathrm{Be}\) nuclei require no energy to spontaneously decompose into \(^{4}\) He nuclei, so they would immediately do so." Verify this statement by calculating the binding energy of \(^{8} \mathrm{Be}\) and comparing it to that of \(^{4} \mathrm{He}\).

Radiation exposure leads to the ionization of water to \(\mathrm{H}_{2} \mathrm{O}^{+},\) which reacts to form \(\mathrm{H}_{3} \mathrm{O}^{+}\) and \(\mathrm{OH}\). Draw Lewis structures for these three molecules or molecular ions.

In what ways are the fusion reactions that formed alpha particles during primordial nucleosynthesis different from those that fuel our sun today?

Complete the following nuclear equations describing the preparation of isotopes for nuclear medicine. a. \(^{197} \mathrm{Au}+? \rightarrow^{199} \mathrm{Hg}+\beta\) b. \(^{64} \mathrm{Ni}+^{1} \mathrm{H} \rightarrow^{64} \mathrm{Cu}+?\) c. \(^{63} \mathrm{Cu}+? \rightarrow^{66} \mathrm{Ga}+^{1} \mathrm{n}\) d. \(^{67} \mathrm{Zn}+^{1} \mathrm{n} \rightarrow^{67} \mathrm{Cu}+?\)
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