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PLS!!!! A rubidium 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

Respuesta :

pstnonsonjoku

From the calculation, there is still more than 75 percent on the earth now (option D).

What is half life?

The term half life is the time taken for half of the number of radioactive isotopes to remain.

Given that;

N/No = (1/2)^t/t1/2

N = amount at time t

No = amount at the beginning

t = time taken

t1/2 = half life

Hence;

N/No = (0.5)^4.6 * 10^9/50 * 10^9

N/No = 0.94

Hence, the percentage that is currently in the earth is about 94%.

Learn more about half life:https://brainly.com/question/12701636

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