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Because those are the freezing point and boiling point of mercury. Once past those, the mercury will no linger expand or contract in a proportional way to the temperature changes.

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What liquid metal is most commonly used in thermometer?

The liquid metal in many thermometer is mercury (Hg).


Why is that mercury is used in thermometer?

Mercury is used in thermometers because mercury is the only liquid metal in room temperature. Hence our body temperature is observed by melting the liquid metal mercury due to our body temperature.


What is the mercury in the thermometer?

The Mercury expands with temperature. Since expansion is linear over the normal range of a mercury-driven thermometer, the level of mercury within a little glass tube indicates the current temperature of the thermometer's immediate environment.


What is the liquid in the themometer?

The liquid in a thermometer is typically mercury or alcohol. Mercury is commonly used in traditional thermometers, while newer digital thermometers may use alcohol. These liquids expand and contract with temperature changes, allowing the thermometer to measure the temperature accurately.


Why does the liquid in thermometer go up the tube when it gets hotter?

Heat causes mercury in the thermometer to expand, where as when it is cooled, it contracts.


Is Hg a solid liquid or gas?

Hg is the chemical symbol for the metal mercury. Mercury is a liquid when kept at a normal "room temperature.


Why can a mercury thermometer be used only at high temperatures?

A mercury thermometer can go down to -30 deg C


Do farmers use mercury?

only in a thermometer


What metal element is used to make thermometers?

Mercury is the metal element traditionally used in thermometers due to its ability to expand and contract uniformly with changes in temperature. However, due to its toxicity, mercury thermometers are being phased out in favor of digital alternatives.


How does a glass thermometer works?

As the liquid in the thermometer is heated it expands, and the only way the expanding liquid can go is upward. As the liquid in the thermometer cools, it will contract, and the liquid will fall back down into the resevoir, causing the column of liquid to move downward.


What element is only liquid at room temperature?

Mercury is the only metal to be liquid at room temperature.


What is the metal that is liquid at room temperature?

Mercury is the only metal that is liquid at room temperature. Mercury (Mg) with atomic number 80. It is the only metal that is liquid at room temperature. Another element that is liquid is bromine but it is a non-metal.