The frost on the ground and the white mist on the stage are not liquid 10

Belong. They use nitrogen to get high. After they freeze nitrogen into a liquid. When it encounters a temperature of 0 or more, it will turn into a liquid. Please see below for additional information.

Nitrogen, atomic number 7, atomic weight is. The name of the element is in Greek, which originally meant "saltpeter". It was discovered in 1772 by the Swedish pharmacist Scherer and the English chemist Rutherford, and later determined by the French scientist Lavoisier that it was an element.

The content of nitrogen in the earth's crust is that most of the nitrogen in nature exists in the atmosphere in the form of elemental molecular nitrogen, which accounts for 78% of the volume of air. The most important mineral of nitrogen is nitrate. There are two naturally occurring isotopes of nitrogen:

Nitrogen 14 and nitrogen 15, where the abundance of nitrogen 14 is.

The density of nitrogen in air is, and the density in ammonia is.

Element name: Nitrogen.

Element symbol: n

Element Type: Non-metallic element.

Atomic weight of the element: 14 01

Number of protons: 7 Number of neutrons: 7

Atomic number: 7

Period: 2

Number of families: va

Electron shell distribution: 2 5

Nitrogen is a colorless, odorless gas, melting point, boiling point, gas density gram liter, critical temperature, critical pressure atmospheric pressure.

And the cream should also be a liquid.

The white mist on the stage is liquid, and the frost on the ground is not.

The frost on the ground is the water vapor in the air in late autumn when it encounters a grass blade with a very low temperature, and it is heated, and it directly condenses to form solid Xiaoice crystals, which is a condensation phenomenon.

The white fog on the stage is to pressurize carbon dioxide into a solid at low temperature, and then release it into the air to directly sublimate from solid carbon dioxide into carbon dioxide gas; A physical process that changes from a solid to a gas, which absorbs a large amount of heat, causing the water vapor in the air to cool down into small particles of liquid. It's a smoke on the stage!

Frost is a small Xiaoice crystal, which is the solid form of water, so it is solid.

The white mist on the stage is a white mist formed when the dry ice solid sublimates into carbon dioxide gas, absorbing heat and liquefiing the surrounding water vapor into small water droplets, so it is liquid.

Frost is solid, and water vapor becomes cold when it is cold.

Smoke on the stage is a smoke-like gas formed by the electrolysis of smoke oil.

Answer D test question analysis: In this question, we must first determine what the white fog is, and then trace its formation back to the source, you can break through this question The white fog is a small water droplet, which is formed by the liquefaction of water vapor in the air when it is cold There is water vapor in every place in the theater, why is the water vapor in this place on the stage liquefied when it is cold This is associated with the fact that the temperature of the stage is reduced by the sprayed material dry ice

The reason is that dry ice sublimates from solid to gaseous, and the sublimation requires heat absorption to cause the surrounding temperature to drop and form a white mist

Therefore, choose the D test point: This question examines the phenomenon of liquefaction and liquefaction, and the phenomenon of sublimation in life.

Comment: In this question, choice C is very confusing, pay attention to the "white fog" in the question