Chemistry
What radioactive metallic element, found in all uranium ores, has an atomic number of 89?
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Gold, silver, lead, and copper exhibit the properties of which of the following crystal systems?
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The study of composition and properties of substances and matter is called?
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Mendelevium on the periodic table is noted by which symbol?
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High levels of what chemical may be in trailers provided for people displaced by Hurricane Katrina?
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What compounds that are soluble in water are classed as bases?
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What is the second most common metal on Earth, and the most widely-used metal?
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