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Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097

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BuyFindarrow_forward

Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097
Textbook Problem

The biological effects of a particular source of radiation depend on several factors. List some of these factors. Even though 85Kr and 90Sr are both β-particle emitters, the dangers associated with the decay of 90Sr are much greater than those linked to 85Kr. Why? Although γ rays are far more penetrating than α particles, the latter are more likely to cause damage to an organism. Why? Which type of radiation is more effective at promoting the ionization of biomolecules?

Interpretation Introduction

Interpretation: The factors on which biological effect of a particular source of radiation depends are to be listed. The reason for greater danger associated with 90Sr in comparison to 85Kr and more damage to an organism by alpha particles than gamma particles is to be stated. The type of radiation more effective at promoting the ionization of biomolecules is to be stated.

Concept introduction: The Sr do not possess radioactive properties but its isotope 90Sr have high radioactive properties and it undergo beta decay. It causes damage to humans as well as environment. Radon- 222 decays by alpha particle production and also possesses health risks.

To determine: The factors on which biological effect of a particular source of radiation depends, reason for greater danger associated with 90Sr in comparison to 85Kr and more damage to an organism by alpha particles than gamma particles and the type of radiation more effective at promoting the ionization of biomolecules.

Explanation

Explanation

The factors on which the biological effects of a particular source of radiation depend are listed below.

The biological effects of a particular source of radiation depend on several factors. They are:

  1. 1. The energy of radiation: higher the energy content of radiation, more damage it will cause.
  2. 2. The penetration ability of the radiation: different particles and rays generated in radioactive process have different penetrating ability.
  3. 3. The ionizing ability of the radiation: Various radiations have different ionizing abilities.
  4. 4. The chemical properties of radiation source: there is difference in behavior of the particles and rays produced by radioactive decay due to different chemical properties.

Explanation

Due to chemical inertness, danger associated with 85Kr is less than 90Sr .

Both strontium- 90 and krypton- 85 is harmful but the radioactive nuclide of Sr possess greater health hazard

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