Chapter 2, Problem 2.29QP

(a)

Interpretation Introduction

Interpretation:

It has to be indicated the isotope which would expect to be radioactive, from the given pair of isotopes.

Concept introduction:

• The elements with same atomic number and different mass number are known as isotopes.
• Radioactive isotopes are the isotopes whose nuclei do not hold together well.
• The belt of stability is the area in a graph of the number of neutrons versus the number of proton in various isotopes where the stable nuclei are located. Most radioactive nuclei lie outside this belt. And their $\frac{\text{n}}{\text{p}}$ ratio is greater than 1.
• A graph consists of a Y- axis labeled neutrons, and in X- axis labelled protons, and which is used to identify the stability of elements is known as belt of stability.

• 

• The elements with same atomic number and different mass number are known as isotopes. Most of the elements have isotopes, in which many of them are stable and unstable.
• From the belt of stability it is possible to find elements which are stable or not. At the upper right of the graph radioactive nuclides located. And the elements beyond the atomic number of 83 are only unstable radioactive elements.
• The ratio between the numbers of neutrons to the number of proton for an element is referred as  $\frac{\text{n}}{\text{p}}$ ratio.
•  This graph consists of a Y- axis labeled neutrons, and in X- axis protons where labelled.  At the upper right of the graph radioactive nuclides located.
• The elements beyond the atomic number of 83 are only unstable radioactive elements.
• The neutron: proton ratio ($\frac{\text{n}}{\text{p}}$ ratio) for stable elements is 1:1 and the elements with atomic numbers up to about 20 are stable.

To indicate: The isotope which would expect to be radioactive, from the given pair of isotopes.

(b)

Interpretation Introduction

Interpretation:

It has to be indicated the isotope which would expect to be radioactive, from the given pair of isotopes.

Concept introduction:

• The elements with same atomic number and different mass number are known as isotopes.
• Radioactive isotopes are the isotopes whose nuclei do not hold together well.
• The belt of stability is the area in a graph of the number of neutrons versus the number of proton in various isotopes where the stable nuclei are located. Most radioactive nuclei lie outside this belt. And their  $\frac{\text{n}}{\text{p}}$ ratio is greater than 1.
• A graph consists of a Y- axis labeled neutrons, and in X- axis labelled protons, and which is used to identify the stability of elements is known as belt of stability.

• 

• The elements with same atomic number and different mass number are known as isotopes. Most of the elements have isotopes, in which many of them are stable and unstable.
• From the belt of stability it is possible to find elements which are stable or not. At the upper right of the graph radioactive nuclides located. And the elements beyond the atomic number of 83 are only unstable radioactive elements.
• The ratio between the numbers of neutrons to the number of proton for an element is referred as $\frac{\text{n}}{\text{p}}$ ratio.
•  This graph consists of a Y- axis labeled neutrons, and in X- axis protons where labelled.  At the upper right of the graph radioactive nuclides located.
• The elements beyond the atomic number of 83 are only unstable radioactive elements.
• The neutron: proton ratio ($\frac{\text{n}}{\text{p}}$ ratio) for stable elements is 1:1 and the elements with atomic numbers up to about 20 are stable.

To indicate: The isotope which would expect to be radioactive, from the given pair of isotopes.

(c)

Interpretation Introduction

Interpretation:

It has to be indicated the isotope which would expect to be radioactive, from the given pair of isotopes.

Concept introduction:

• The elements with same atomic number and different mass number are known as isotopes.
• Radioactive isotopes are the isotopes whose nuclei do not hold together well.
• The belt of stability is the area in a graph of the number of neutrons versus the number of proton in various isotopes where the stable nuclei are located. Most radioactive nuclei lie outside this belt. And their  $\frac{\text{n}}{\text{p}}$ ratio is greater than 1.
• A graph consists of a Y- axis labeled neutrons, and in X- axis labelled protons, and which is used to identify the stability of elements is known as belt of stability.

• 

• The elements with same atomic number and different mass number are known as isotopes. Most of the elements have isotopes, in which many of them are stable and unstable.
• From the belt of stability it is possible to find elements which are stable or not. At the upper right of the graph radioactive nuclides located. And the elements beyond the atomic number of 83 are only unstable radioactive elements.
• The ratio between the numbers of neutrons to the number of proton for an element is referred as $\frac{\text{n}}{\text{p}}$ ratio.
•  This graph consists of a Y- axis labeled neutrons, and in X- axis protons where labelled.  At the upper right of the graph radioactive nuclides located.
• The elements beyond the atomic number of 83 are only unstable radioactive elements.
• The neutron: proton ratio ($\frac{\text{n}}{\text{p}}$ ratio) for stable elements is 1:1 and the elements with atomic numbers up to about 20 are stable.

To indicate: The isotope which would expect to be radioactive, from the given pair of isotopes.