The argon flow through the porous anode was varied systematically between Af and Af.

A flow of argon gas ( usually 14 to 18 liters per minute ) is introduced between the two outermost tubes of the torch and an electric spark is applied for a short time to introduce free electrons into the gas stream.

A second flow of argon ( around 1 liter per minute ) is usually introduced between the central tube and the intermediate tube to keep the plasma away from the end of the central tube.

A flow of argon gas ( usually 14 to 18 liters per minute ) is introduced between the two outermost tubes of the torch and an electrical spark is applied for a short time to introduce free electrons into the gas stream.

Thermal mass flow meter ( also called thermal dispersion flowmeter ) technology is used for compressed air, nitrogen, helium, argon, oxygen, and natural gas.

Faster flow rates can be achieved by using a pump or by using compressed gas ( e. g. air, nitrogen, or argon ) to push the solvent through the column ( flash column chromatography ).

Gases heavier than air ( e. g. argon ) blanket the weld and require lower flow rates than gases lighter than air ( e. g. helium ).

Helium is more expensive than argon and requires higher flow rates, so despite its advantages it may not be a cost-effective choice for higher-volume production.

Additionally, higher current requires greater flow, and generally, more helium is required to provide adequate coverage than argon.

This method involves the production and flow of thermalised hydrated hydronium cluster ions in inert helium or argon carrier gas along a flow tube following the introduction of a humid air sample.

Nearly all of this argon is radiogenic argon-40 derived from the decay of potassium-40 in the Earth's crust.

The name " argon " is derived from the Greek word αργον meaning " lazy " or " the inactive one ", a reference to the fact that the element undergoes almost no chemical reactions.

Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily non-reactive substances become reactive ; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning.

To do this, the sample is first isolated from the vacuum by means of the taps, the vacuum over the sample is then replaced with an inert gas ( such as nitrogen or argon ) and can then be stoppered and removed.

* Ion beam milling – thins samples until they are transparent to electrons by firing ions ( typically argon ) at the surface from an angle and sputtering material from the surface.

Gadolinium metal is obtained from its oxide or salts by heating with calcium at 1450 ° C under argon atmosphere.

Ramsay was looking for argon but, after separating nitrogen and oxygen from the gas liberated by sulfuric acid, he noticed a bright yellow line that matched the D < sub > 3 </ sub > line observed in the spectrum of the Sun.

Neon, argon, krypton, and xenon are obtained from air using the methods of liquefaction of gases and fractional distillation.

Along with scientist William Ramsay at University College, London, Lord Rayleigh theorized that the nitrogen extracted from air was mixed with another gas, leading to an experiment that successfully isolated a new element, argon, from the Greek word (, " inactive ").

The smallest of these fragments in ternary processes ranges in size from a proton to an argon nucleus.

In anywhere from 2 to 4 fissions per 1000 in a nuclear reactor, a process called ternary fission produces three positively charged fragments ( plus neutrons ) and the smallest of these may range from so small a charge and mass as a proton ( Z = 1 ), to as large a fragment as argon ( Z = 18 ).

A small piece of rapidly melting argon ice shows the transition from solid to liquid.

In terms of fabrication, all welding of tantalum must be done in an inert atmosphere of argon or helium in order to shield it from contamination with atmospheric gases.

The same experiment, known as ICARUS and based on a new technique of electronic detection of ionizing events in ultra-pure liquid argon, is aiming at the direct detection of the neutrinos emitted from the Sun, a first rudimentary neutrino telescope to explore neutrino signals of cosmic nature.

One concept, known as the Titan Aerobot Multisite mission, involves a reversible-fluid balloon filled with argon that could descend from high altitude to the surface of the moon, perform measurements, and then rise again to high altitude to perform measurements and move to a different site.

Making the plasma from argon, instead of other gases, has several advantages.

A small piece of rapidly melting argon ice simultaneously shows the transitions from solid to liquid to gas.

* 1894 Lord Rayleigh and William Ramsay discover argon by spectroscopically analyzing the gas left over after nitrogen and oxygen are removed from air

Unfortunately for these requirements, when positive argon ions reach the cathode and become neutral argon atoms again by obtaining electrons from it, the atoms can acquire their electrons in enhanced energy levels.

Assuming thermal equilibrium between the anode surface and the transpiring argon, the gas enthalpy rise through the anode was calculated according to the relation Af whereby the specific heat of argon was taken as Af.

For example, the creation of argon fluorohydride ( HArF ), a marginally stable compound of argon with fluorine and hydrogen, was reported by researchers at the University of Helsinki in 2000.

The symbol for argon is now Ar, but up until 1957 it was A.

John William Strutt, 3rd Baron Rayleigh, OM ( 12 November 1842 – 30 June 1919 ) was an English physicist who, with William Ramsay, discovered argon, an achievement for which he earned the Nobel Prize for Physics in 1904.

Rare gases is another term that was used, but this is also inaccurate because argon forms a fairly considerable part ( 0. 94 % by volume, 1. 3 % by mass ) of the Earth's atmosphere.

The first stable compound of argon was reported in 2000 when argon fluorohydride ( HArF ) was formed at a temperature of.

It was discovered ( along with krypton and xenon ) in the summer of 1898 as one of the three residual rare inert elements remaining in dry air, after nitrogen, oxygen, argon and carbon dioxide are removed.

Sir William Ramsay ( 1852 – 1916 ) was a Scottish chemist who discovered the noble gases and received the Nobel Prize in Chemistry in 1904 " in recognition of his services in the discovery of the inert gaseous elements in air " ( along with Lord Rayleigh who received the Nobel Prize in Physics that same year for the discovery of argon ).

In the 1890s ( around 100 years later ) two British physicists, William Ramsay and Lord Rayleigh, realized that their newly discovered inert gas, argon, was responsible for Cavendish's problematic residue ; he had not made an error.

Lecoq contributed more to the development of the periodic classification of elements by proposing, soon after its discovery, that argon was a member of a new, previously unsuspected, chemical series of elements, later to become known as the noble gases.

Helium was previously used, but it was less suitable because it diffuses out of the case more quickly than argon.

The product was then cooked at 1400 ° C in an argon atmosphere for two hours.

* The radiogenic argon measured in a sample was produced by in situ decay of in the interval since the rock crystallized or was recrystallized.