Geography, 12.01.2020 04:31, garacey241

Arubidium isotope has a half-life of almost 50 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?

less than 10 percent
25 percent
50 percent
more than 75 percent

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Arubidium isotope has a half-life of almost 50 billion years. given that scientists estimate earth's...