Concept explainers
(a)
Interpretation:
The radius (r) of a nucleus is directly proportional to the (r3) of mass number (A) to be shown and the volume for U235 nucleus should be determined.
Concept Introduction:
- Half-life period: The time required to reduce half of its original value.
- This is denoted by:t1/2
- 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=0.693t1/2 Equation.
- The half-life in first order does not depend upon the initial concentration.
Formula:
The volume of a sphere is V=43πr3
Age calculation:
lnNtN0=-kt
Calculate the age and rate constant:
K=0.693t1/2
(b)
Interpretation:
The radius (r) of a nucleus is directly proportional to the (r3) of mass number (A) to be shown and the volume for U235 nucleus should be determined.
Concept Introduction:
- Half-life period: The time required to reduce half of its original value.
- This is denoted by:t1/2
- 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=0.693t1/2 Equation.
- The half-life in first order does not depend upon the initial concentration.
Formula:
The volume of a sphere is V=43πr3
Age calculation:
lnNtN0=-kt
Calculate the age and rate constant:
K=0.693t1/2
To determine: The calculated volume for the U235 nucleus by substituting the equation derived in step-1.

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Chapter 19 Solutions
CHEMISTRY 1111 LAB MANUAL >C<
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