What Would the Atom Ratio of ²⁰⁶Pb to ²³⁸U Be

question 2

Multiple Choice

What would the atom ratio of ²⁰⁶Pb to ²³⁸U be in a uranium mineral from a rock that is 1.0 × 10⁹ years old? t_1/2(²³⁸U) = 4.5 × 10⁹ yr.

• A)0.14
• B)0.16
• C)0.22
• D)0.86
• E)1.16

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Definitions:

Average Number

The result obtained by adding several quantities together and then dividing this total by the number of quantities; the arithmetic mean.

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