Chapter 20.1, Problem 20.3E

(a)

Interpretation Introduction

Interpretation:

The following nuclide, which are radioactive and which is stable has to be explained.

${}_{\text{50}}^{\text{118}}\text{Sn}$

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.

(b)

Interpretation Introduction

Interpretation:

The following nuclide, which are radioactive and which is stable has to be explained.

${}_{\text{33}}^{\text{76}}\text{As}$

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 nuclide, which are radioactive and which is stable has to be explained.

${}_{\text{89}}^{\text{227}}\text{Ac}$

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.