Uranium-238 has a half-life of 4.5 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on Earth?

A. 10 percent
B. 25 percent
C. 50 percent
D. 75 percent

The correct answer is option C. ;

Answered by Tringa0 | 2024-06-12

Uranium 238 that ws created at the beginning of earth have undergone 1.0222 half-lives, so it would have 50% of its original material.

Answered by lfis0102 | 2024-06-19

The percentage of parent Uranium-238 isotopes currently existing on Earth is approximately 50%. This is due to the Earth's age being around 4.6 billion years, which is slightly more than one half-life of Uranium-238 (4.5 billion years). Therefore, the correct answer is option C.
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Answered by Tringa0 | 2024-11-16