What cause mercury to harden is it air or heat?

as in if a thermometer broke would the mercury how could it change in volume or consistancy?

Answer:
If a mercury thermometer broke, the mercury remains liquid but is quite dangerous as it is toxic and will give off mercury vapour even at room temperatures.
Why the hell have you put Freddie Mercury in a thermometer. He has been dead for ten years, no wonder he has harderned up a bit
It would be pretty hard at 0 degrees Kelvin (About -273 Centigrade)
Mercury is a metal which is liquid at "room temperature"
Most metals e.g.iron, are solid until vastly higher temperatures.
If you broke open a thermometer containing mercury you would find little balls of mercury all over the place, and you can't pick them up because they are liquid.
Mercury is poisonous. Ever heard of the phrase "mad as a hatter", well that was because hat makers in the 18th/19th centuries used to use mercury in their hat making processes and it even the vapour from it gave them brain damage.
I think that that mercury is no longer used in thermometers for just the above reason.
The cold causes it to harden but it would have to be very cold
You can easily break a mercury thermometer by getting it to an high temperature. The mercury will try to vapozie in the themometer and will eventually break it. I have broken several mercury themometers in Chem class. As for consistency. it should mosly remain liquid, unless there is another metal present and it will attempt to form an alloy of some type.
Mercury will 'harden', "Freeze" at -39°C.
-273c or 0K is a hypothetical temperature and cannot be achieved. They cann't go farther than -180c. Don't u think same or I m wrong.

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