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What is the approximate half-life of uranium- 238 ? a. hundred of years b. thousands of years c. millions of years d. billions of years
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In 2002, the rare earth elements mine in mountain pass, california was closed because
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The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy
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Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element
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What is the approximate half-life of uranium- 238 ? a. hundred of years b. thousands of years c. mi...
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