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Which phrase describes one characteristic of radioactive elements? What is the age of a meteorite if potassium-40 decayed from 80 g to 10 g? The half-life of potassium-40 is 1.3 billion years.
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The big bang theory suggest that the universe is about - 300 million years old - 4.6 billion years old - 30 billion years old - 13 billion years old
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Which phrase describes one characteristic of radioactive elements?
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