Chemistry

What makes matter expand when it's heated and contract when it's cooled?

More Questions from Chemistry
What is the second most common metal on Earth, and the most widely-used metal?
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Sodium on the periodic table is noted by which symbol?
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What type of compound is prepared by the oxidation of primary alcohols?
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Which of the following analytical techniques gives an "ion peak"?
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What is the symbol used on the periodic table for the element Terbium?
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Reacting an alkene with water produces which of the following?
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What is a combination of substances that still remain intact?
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Which of these is used to determine the strength of a chemical bond?
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