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Title: Element A decays into element B with a half-life of 700 million years. You find a rock that you ... Post by: staedtler on Mar 16, 2017 Element A decays into element B with a half-life of 700 million years. You find a rock that you know was formed originally without any B present. But the rock now contains both A and B, with the A+B portion of the rock being 1/8 A and 7/8 B. How old is the rock?
A) 350 million years C) 1.4 billion years B) 700 million years D) 2.1 billion years Title: Re: Element A decays into element B with a half-life of 700 million years. You find a rock that you ... Post by: discoverer on Mar 16, 2017 Content hidden
Title: Re: Element A decays into element B with a half-life of 700 million years. You find a rock that you ... Post by: staedtler on May 1, 2017 ;D Exactly what I needed
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