# Chapter 20, Problem 20.24QP

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### CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

#### Solutions

Chapter
Section
FindFindarrow_forward

### CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933
Interpretation Introduction

Interpretation:

The half-life period of Y90 should be calculated by using the given data.

Concept Introduction:

• Thisprocess is the accompanied by the emission of one or more than one types of ionizing radiation like alpha ,beta, neutron, particles and gamma rays are disintegrate
• Radio active life-it refers to the amount of time taken by completion of half of its original isotope to decay. The rate of decay is a fixed rate called half-life.
• Half-life used in carbon dating-technique forthe age calculation of dead wood fossil, monument old tree etc.
• The half-life period s are determined by considering carbon dating technique.
• Carbon dating uses the half-life of carbon-14 to find the approximate age of an object. It’s may be 40.000 year old or younger.
• Radioactive isotope: An atom in a chemical compound is replaced by another atom, of the same chemical element. This is the principle behind the radioactive tracers.

Titanium is the example of radioactive isotope.

Given:

Y90 have activity 9.8 ×105 disintegration/minute at 1:00 p.m., 12/3/10

At 2:15 p.m., 12/17/10 , activity measured is 2.6×104 disintegration/minute.

Formula:

Half –life period:

t1/2=0.693k

For identifying k or t value:

lnNtN0=-kt

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