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OpenStudy (anonymous):
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
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OpenStudy (ookawaiioo):
You forgot to medal me for your last question
OpenStudy (anonymous):
Oops sorry~
OpenStudy (ookawaiioo):
Well, I cannot help you anymore. Goodluck
OpenStudy (anonymous):
Alright thanks
OpenStudy (anonymous):
@StudyGurl14 can you help me?
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OpenStudy (studygurl14):
50% I believe
OpenStudy (anonymous):
half life is saying that once 4.5 billion years pass, 50% of it would have decayed. So it would have only went through 1 half life. so 50% is gone
OpenStudy (anonymous):
Ohh~ I get it now thanks c:
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