Chapter 10, Problem 10B.2E

(a)

Interpretation Introduction

Interpretation:

The half life period of Potassium-40 has to be given.

Concept Introduction:

Half life period:

The half life is defined as the amount of time it takes for a given isotope to lose half of its radioactivity.

  ${\text{t}}_{\left(\text{1/2}\right)}\text{=}\frac{\text{ln2}}{\text{k}}$

Where k is the decay constant.

(b)

Interpretation Introduction

Interpretation:

The half life period of Cobalt-60 has to be given.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The half life period of Nobelium-255 has to be given.

Concept Introduction:

Refer to part (a).