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Home Q & A Board Science-Related Homework Help Physics Astronomy
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adreamer adreamer
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7 years ago
A rock sample contains 1/8 micrograms of the parent radioactive isotope Al-26 and 7/8 micrograms of its daughter isotope Mg-40. If the half-life of this decay is approximately 700,000 years, how old is this rock?
A) 2.1 million years
B) 2.8 million years
C) 1.4 million years
D) 700,000 years
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Life in the Universe

Life in the Universe


Edition: 4th
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19Clyde19Clyde
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