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

question 94

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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