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

14th Edition
Burdge
ISBN: 9781259327933

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FindFindarrow_forward

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

14th Edition
Burdge
ISBN: 9781259327933
Interpretation Introduction

Interpretation:

The activity of the carbon-14 in the bones in disintegration per minute per gram should be calculated.

Concept Introduction:

  • Radioactive decay:
  • This process 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 for the 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 half-life period of the CARBON -14 in the bones calculated by using the given data.

Formula:

Half –life period:

t1/2=0.693k

For identifying k or t value:

lnNtN0=-kt

Given:

The age of animal’s bones determined by carbon C-14 dating to be 8.4×103year old.

The original activity was 15.3 dis/min per gram.

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