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General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343

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Chapter
Section
BuyFindarrow_forward

General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343
Chapter 20, Problem 20.41QP
Textbook Problem
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From each of the following pairs, choose the nuclide that is radioactive. (One is known to be radioactive, the other stable.) Explain your choice.

  1. a 51 122 Sb, 54 136 Xe
  2. b 82 204 Pb, 85 204 At
  3. c 37 87 Rb, 37 80 Rb

(a)

Interpretation Introduction

Interpretation:

The following pairs, which is radioactive nuclide has to be explained.

51122Sb, 54136Xe

Concept introduction:

Nuclear stability:  There are many factors that give to nuclear stability.  These are,

  • Full nuclear shell (magic number)
  • Even number of protons and neutrons
  • Proton to neutron ratio

Note: When element has an atomic number higher than 83, it is unstable.

Explanation of Solution

51122Sb, 54136Xe

Both nuclei did not have magic number of protons.  The neutrons are in the each nucleus is,

Sb: number of neutrons =A-Z =122-51= 71

(b)

Interpretation Introduction

Interpretation:

The following pairs, which is radioactive nuclide has to be explained.

82204Pb, 85204At

Concept introduction:

Nuclear stability:  There are many factors that give to nuclear stability.  These are,

  • Full nuclear shell (magic number)
  • Even number of protons and neutrons
  • Proton to neutron ratio

Note: When element has an atomic number higher than 83, it is unstable.

(c)

Interpretation Introduction

Interpretation:

The following pairs, which is radioactive nuclide has to be explained.

3387Rb,3790Rb

Concept introduction:

Nuclear stability:  There are many factors that give to nuclear stability.  These are,

  • Full nuclear shell (magic number)
  • Even number of protons and neutrons
  • Proton to neutron ratio

Note: When element has an atomic number higher than 83, it is unstable.

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Chapter 20 Solutions

General Chemistry - Standalone book (MindTap Course List)
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