A certain element has a half life of 4.5 billion years. a. You find a rock containing a mixture of the element and lead. You det
ermine that 60% of the original element remains; the other 40% decayed into lead. How old is the rock? b. Analysis of another rock shows that it contains 5% of its original element; the other 95% decayed into lead. How old is the rock?
1 answer:
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