Nitrogen CAN freeze.
More Info: Nitrogen freezes at 63 Kelvin or -210.01 degrees Celsius. When it does this, it takes on a beta hexagonal close-packed crystal allotropic form, though at anything below 35.4 Kelvin or -237.6 degrees Celsius it takes on a cubic allotropic form, which is known as its alpha-phase.
Can Liquid Nitrogen Freeze?
Liquid nitrogen is simply gaseous nitrogen in a liquid state. It differs from the gas state though in that it serves as a cryogenic fluid, meaning it can freeze living tissue quickly upon contact. With this in mind, it is still possible to turn the liquid nitrogen from a liquid state into a solid state by freezing it. To do so, it must first be placed in a vacuum chamber that is operated through the use of a rotary pump. It will then freeze and turn into a solid once it has reached 63 Kelvin or -210.01 degrees Celsius, just like its gaseous state.
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