What properties does the noble gas use as an electric light source?

Noble gases are used in electric light sources to use their physical properties, and noble gases are used in electric light sources to use colored light of different colors when they are energized.

At room temperature and pressure, they are all colorless and odorless monoatomic gases, which are difficult to carry out chemical reactions. In the atoms of noble gas elements, the arrangement of electrons in the various electron shells reaches just a stable number. Therefore, it is not easy for atoms to lose or gain electrons, and it is difficult for them to chemically react with other substances.

When the external power supply circuit is turned on, the output of the transformer will generate a high voltage of thousands of volts or even tens of thousands of volts. When this high voltage is applied to the electrodes at both ends of the neon tube, the charged particles in the neon tube are accelerated in the high-voltage electric field and fly to the electrodes, which can excite and produce a large number of electrons. These excited electrons are accelerated in a high-voltage electric field and collide with the gas atoms inside the lamp.

When these electrons collide with the energy of the free gas atoms and the energy is large enough, the gas atoms can be ionized and become positive ions and electrons, which is the ionization phenomenon of gas. When charged particles collide with gas atoms, the excess energy is emitted in the form of photons, which completes the whole process of lighting up the neon sign.

Light color Gas in tube Glass tube or phosphor color.

Red colorless.

Fire yellow, neon, creamy yellow.

Orange green.

Rose, blue.

Blue Blue.

Green Green.

White argon, a small amount of white.

Custard, mercury, custard.

Jade Jade Jade.

Pale Rose Pale Rose.

Golden Golden tube + custard powder.

Light green, green, white mixed powder.

Answer]: Due to the nature of noble gases is very inactive, it is often used as a protective gas, such as welding metal with noble gas to isolate the air, and the bulb is filled with rare gas to make the bulb durable. Because the noble gas can emit different colors of light when it is energized, it can be made into a variety of electric light sources, such as navigation lights, strong lights, flashing lights, neon lights, etc., and can also be used in laser technology.

Their chemical properties are so stable that they do not react with filaments at high temperatures to cause filament deterioration.

Noble gas. It is stable in nature and can be used as a protective gas.

Noble gases include helium, neon, argon, krypton, xenon, and radon.

Their atoms, except for helium, all satisfy the stable structure of eight electrons in the outermost shell, eighteen electrons in the subouter shell, and thirty-two electrons in the penultimate shell, while helium is also a stable structure because the outermost layer is the k layer and can only hold two electrons. They are substances that are directly composed of atoms, that is, their molecules are all directly made of atoms, and they are all colorless and odorless gases.

Due to the stable nature of noble gases, they generally do not react chemically with other substances.

So they can be used as protective gases, but this has nothing to do with the electric light source. In addition, nitrogen can also be used as a protective gas, because the nature of nitrogen is also relatively stable, it cannot be burned, nor can it be combusted, and can exist in large quantities in the air.

The use of noble gases in electric light sources is to use the use of rare gases that can emit colored light when energized, and do not need to be expressed by chemical changes, which is a physical property

Therefore, fill in: True

Summary. Ideas are clicked.

The metal activity of zinc and iron is stronger than that of copper, and the metal activity of zinc is stronger than that of iron, so a certain quality mixture of zinc powder and iron powder is added to the CUSO solution.

Zinc first reacts with copper sulfate to form zinc sulfate and copper, and after the zinc powder reaction, if there is copper sulfate, iron can react with copper sulfate solution to form ferrous sulfate and copper, and the solution is analyzed accordingly.

What is wrong with the statement that the chemical system of noble gases is stable and can produce a variety of electric light sources?

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Wrong. Because the electric light source of noble gases is made of the electronic transition-related properties of noble gases, which has nothing to do with chemical properties.

Teacher, isn't option D wrong for this question?

Doesn't the presence of air bubbles in the filter residue mean that the iron is also in it?

Iron is in it, and zinc is naturally in it.

The question of rare gases just now, can't noble gases be used to make neon lights? It can reflect chemical properties. The one in the back is not yet in junior high school.

The idea is that the metal activity of zinc and iron is stronger than that of copper, and the metal activity of zinc is stronger than that of iron, and a certain quality of zinc powder and iron powder mixture is added to the cuso solution, and the zinc first reacts with copper sulfate to form zinc sulfate and copper, and after the zinc powder is reactive, if there is copper sulfate, the iron can react with the copper sulfate solution to form ferrous sulfate and copper, and the solution is analyzed accordingly.

b. If the filtrate is a colored solution, it may be that there is a surplus of copper sulfate, and the filtrate contains zinc ions, ferrous ions, and copper ions; Or ferrous sulfate is generated, copper sulfate is not left, and the filtrate contains zinc ions and ferrous ions; The filtrate contains at least 2 metal ions, so the option is correct.

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Physical.

Noble gases are gases composed of group 0 elements on the periodic tremor table. At room temperature and pressure, they are all colorless and odorless monoatomic gases.

Noble gases are gases made up of group 0 elements on the periodic table. There are seven noble gases, which are helium (He), neon (Ne), argon (Ar), krypton (Krypton), xenon (Xe), radon (RN, radioactive), and gas (OG, radioactive, man-made element).

Noble gases emit light when energized. The world's first neon sign was filled with neon gas (neon originally meaning "neon lamp" in English). The red light emitted by the neon lamp is very transmitting in the air and can pass through dense fog.

Due to the relative content of various gases, a variety of neon lights are produced.

Commonly used fluorescent lamps are made by filling a small amount of mercury and argon in the lamp and coating the inner wall with a fluorescent substance (such as calcium halophosphate). When the power is on, the ultraviolet rays are generated in the tube due to the discharge of mercury vapor, which excites the fluorescent substance and makes it emit visible light similar to sunlight, so it is also called the day hole to make a light lamp. Krypton can reduce the evaporation rate of lead wires in lamp segments, and is often used in high-performance incandescent lamps with higher color temperature and efficiency.

Answer]: B This question examines the common electric light source and its characteristics. Commonly used electric light sources include thermally induced photoelectric light sources (such as incandescent lamps, tungsten halogen lamps, etc.); Emission light source (such as fluorescent lamp, mercury lamp, sodium lamp, metal halide lamp, xenon lamp, etc.); Solid hair and rental resistant to photoelectric light sources (such as LEDs and field luminescent devices, etc.) type shirts.