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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 percentage of radioactive C-14 should be determined by using the following data listed in question.

Concept Introduction:

  • Half-life period: The time required to the reduce to half of its original value.
  • This is denoted by t12
  • This term is popularly use in nuclear chemistry, to describe the stability & instability of atoms or radioactive decay.
  • For determination of first order rate constant K in half –life period we use

    K=0.629t12 Equation.

  • The half-life in first order does not depends upon the initial concentration.

Determine: the percentage and rate constant is being determine by considering the age of carbon-14 isotope.

Formula:

The number of disintegration is directly proportional to the number of radioactive nuclei

lndecay rate of old sampledecay rate of fresh sample= -kt

Age calculation:

lnNtN0= -kt

K=0.629t12

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