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There are main groups in the modern periodic table of elements
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Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.
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What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?
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Compared to the mass and the penetrating power of an alpha particle, a beta particle has?
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English, 08.03.2021 05:10
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History, 08.03.2021 05:10
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