Chemistry
Actinium on the periodic table is noted by which symbol?
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What are the products of propanoic acid and ethanol when the two are combined with warm sulphuric acid?
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What is the third most abundant gas in the earth's atmosphere?
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What is the most abundant element in the known universe?
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What metal is known for the chemical compounds it forms, such as emeralds and aquamarines?
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What is the breakdown of a material by separation of the layers of which it is composed called?
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What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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