The number of atom left after 42.0min should be calculated. Concept Introduction: Radioactive decay: 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 . To determine: The number of atom decrease by half for each half-life is explained by using the given data. Given: Radioactive decay of 206 Tl & 82 206 Pb has a half-life period 4.20min. Starting atoms with 5.00 × 10 22 atoms of 206 Tl .

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Chapter 20, Problem 20.23QP

Interpretation Introduction

Interpretation: The number of atom left after 42.0min should be calculated.

Concept Introduction:

Radioactive decay:

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.

To determine: The number of atom decrease by half for each half-life is explained by using the given data.

Given:

Radioactive decay of 206Tl & 82206Pb has a half-life period 4.20min.

Starting atoms with 5.00 ×1022 atoms of 206Tl .

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