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OpenStudy (anonymous):
uranium-235 has a half-life of 713 million years . would uranium-235 or carbon-14 be more useful for dating a fossil from precambrian time ? esplain
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OpenStudy (wolfe8):
Welcome to OpenStudy. As you know, both are radioactive substances that emit harmful radiation. Since uranium will take 713 million years to reduce half its number, would you want it to be used in labs?
OpenStudy (unklerhaukus):
Carbon 14 has half life of 5730 yr
OpenStudy (wolfe8):
That sounds just a bit better, lol
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