Why is mercury the only metal to have been used in thermometers?
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Yes, friend, it is true because, it is the only metal that have the specific boiling and melting point to have been used in temperature.....
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Most metals are good conductors of heat and they are solids at room temperature. Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion....It also has a high boiling point which makes it very suitable to measure higher temperatures.
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