why argon is an inert gas？
1. Why is argon an inert element?
The so-called "inert inert gas" means that these gases are very stable, have low reactivity, and are not easy to form compounds with gases. In fact, the "inertia" of argon can be seen from the periodic table. Argon is in group zero in the periodic table of elements. The outermost shell of an atom has eight electrons, which form a stable structure. Its chemical properties are extremely inactive. Argon, hydrogen, neon, krypton, xenon, and radon are also noble gases.
2. Why are argon and helium called noble gases?
The inert gas system refers to argon (Ar), helium (He), neon (Ne), krypton (kr), xenon, (xe) and radon (Rn), because of their inactive chemical properties, it is difficult to chemically react with other substances reaction, so it is called an inert gas. Since the content of these six gases in the air is less than 1%, they are also called rare gases.
In Greek, argon means "lazy", so people use the inertness of gas as a protective gas in metal welding and cutting operations to prevent it from being oxidized. The chemical inertness of argon is also used in the smelting of special metals. The blowing and protection of argon is an important way to improve the quality of steel. Because argon gas has high density and low thermal conductivity, filling it into the bulb can reset the life of the bulb and increase the brightness, so argon gas is used in the lighting industry and filling various dischargers, and is also used in lasers and surgical hemostasis spray gun. Argon can be used as a carrier gas in large chromatographs.
Helium means "sun" in Greek, so. Helium was previously referred to as "solar matter". It is an extremely important industrial gas. With the development of ultra-low ink technology, helium has become a strategic material, and it is becoming more and more important. Helium is used to simulate the space environment and launch rockets: helium is used to make nuclear weapons and atomic bombs; infrared detection technology and low-temperature electronics Technical use of helium enables it to achieve high sensitivity and high precision.
3. What is the difference between a noble gas and an inert gas?
Rare gases (helium, neon, argon, krypton, xenon, nitrogen,) are all inert gases, the difference: the number of electrons in the outermost shell of rare gases is all (neon 2 is outer), and they do not react with other substances.
4. What is the difference between an inert gas and a reactive gas?
Inert gases are helium and argon, which do not react at all with the molten weld seam and are used for MIG welding (metal-inert gas arc welding). Reactive gases generally include carbon dioxide, oxygen, nitrogen and hydrogen. These gases participate in the welding process by stabilizing the arc and ensuring smooth delivery of material to the weld. When present in large quantities, they can damage the weld, but in small amounts can improve welding characteristics. Used in MAG welding (Metal-Activated Gas Arc Welding ).
An inert gas is generally a gas that does not or hardly undergoes a chemical reaction, such as nitrogen.
Reactive gases are gases that react easily, such as oxygen. hydrogen.
In oceanography, five inert gases such as helium, neon, argon, krypton, and xenon, and nitrogen are called inert gases. Also called conservative gas. Because the distribution and variation of these gases in most oceans is mainly determined by various physical processes and the influence of temperature and salinity on their solubility. In addition to the above gases, collectively referred to as reactive gases (see reactive gases), they are also affected by factors such as biogeochemistry.
Dissolved nitrogen in the ocean is not entirely related to biological processes. Some biological processes can convert nitrogen into organic nitrogen, and finally into nitrate. Under anaerobic conditions, nitrogen can also be released when organic matter is oxidized and decomposed under the action of bacteria.
5. What are the dangers of noble gases?
Inert gases are colorless and odorless. Inert gases such as nitrogen, argon, and helium are generally considered harmless, so there is little or no safety consideration. The opposite is true. Since inert gases are not recognized by the human senses, they can be more dangerous than toxic gases with strong odors (such as ammonia, hydrogen sulfide, and sulfur dioxide), which are quickly detected by the human body even in low concentrations.
There are no initial physical signs of inert gas asphyxiation, so no clues can be given to the victim or those nearby. The lack of oxygen may cause dizziness, headaches or speaking but victims usually do not associate this symptom with choking. If oxygen levels are low enough, victims may lose consciousness after a few breaths.
Any cerebral hypoxia accident requires immediate medical attention. However, victims can suffer irreversible brain damage and even die. Therefore, a common mistake is for colleagues to attempt to rescue a fall victim by hand without first assessing the situation and/or using safety equipment (i.e. self-contained breathing apparatus). It is not uncommon for poorly planned interventions in the industry to lead to fatalities. Breathing one or two consecutive breaths of an inert gas, such as nitrogen, is a very dangerous practice and usually renders the victim unconscious. If the oxygen levels in the ambient air are too low, the victim may die within minutes of being unconscious.
6. What are the application scenarios of argon gas?
1. Welding and cutting: Argon is widely used in processes such as TIG argon arc welding, plasma cutting and MIG gas shielded welding. Argon can be used to protect electrodes from air during welding to prevent oxidation. 2. Lighting: In argon-filled tube neon lamps and neon lights, when electric current passes through these lamps, they emit light visible to the human eye, making some places look more beautiful and attractive.
3. Gas filling: Argon gas can be used to fill electrical and electronic components to protect them from oxygen and moisture, which effectively prevents damage to the components.
4. Purge: Argon can be used to purge electronic components and instruments to remove dust and dirt.
5. Medical: Argon gas is used in surgery, respiratory support and diagnostics in the medical industry to keep human tissue inert when cooled.
6. Hover vehicles: Argon can also be used as a working fluid in a hover vehicle, allowing the hover vehicle to glide between the air and the ground. In conclusion, argon has important applications and uses in many industrial and scientific fields.
