IUPAC Standard InChIKey: XKRFYHLGVUSROY-UHFFFAOYSA-N CAS Registry Number: 7440-37-1 Chemical structure: This structure is also available as a 2d Mol file; Other names: Ar; UN 1006; UN 1951; argon atom Permanent link for this species. Double glazing is even more efficient if the gap between the two panes of glass is filled with argon rather than just air because argon is a poorer conductor of heat. Thermal conductivity of argon at room temperature (300 K) is 17.72 mW m -1 K -1 (milliWatts per metre per degree) whereas for air it is 26 mW m -1 K -1. In dating: Potassium–argon methods of mass 40 (40 K) to argon gas of mass 40 (40 Ar) formed the basis of the first widely used isotopic dating method.Since radiogenic argon-40 was first detected in 1938 by the American geophysicist Lyman T. Aldrich and A.O. Nier, the method has evolved into one of the most versatile. Element Argon (Ar), Group 18, Atomic Number 18, p-block, Mass 39.95. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Jump to main content. Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934% (9340 ppmv). It is more than twice as abundant as water vapor (which averages about 4000 ppmv, but varies greatly), 23 times as abundant as carbon dioxide (400 ppmv), and more than 500 times.
Atomic Number of Argon is 18.
Chemical symbol for Argon is Ar. Number of protons in Argon is 18. Atomic weight of Argon is 39.948 u or g/mol. Melting point of Argon is -189,4 °C and its the boiling point is -185,9 °C.» Boiling Point» Melting Point» Abundant» State at STP» Discovery Year
Argon is a gas without color and odor, which is one of the noble gases and is totally not reactive with other elements of the Periodic Table. The name of this chemical element originates from the Greek word meaning idle. There is some argon in its pure form in the atmosphere of our planet (estimated to be a little less than 1 per cent) but it has no high biological importance. Argon turns light violet when electricity passes through it. It is used in welding as well as in light and fluorescent bulbs. Also, argon is used to fill up space between two panes of the double glazed windows.
Uses of Argon
Argon, inert gas with the symbol Ar, is used in radio tubes, Geiger counters, fluorescent tubes, and incandescent light bulbs. It is also used in double-glazed windows to fill the space between the panes. And it is used in the production of some metals like titanium, uranium, and zirconium.
Argon can be used in neon lights, heat-treating processes, scientific research, medicine, and 3-D printing too.
Compounds with Argon
- HArF: Argon fluorohydride
- ArH+: Argonium
- MgAr+: Magnesium argide
Properties of Argon Element
|Atomic Number (Z)||18|
|Atomic Weight||39.948 u|
|Melting Point (K)||83.8 K|
|Melting Point (℃)||-189,4 °C|
|Boiling Point (K)||87.3 K|
|Boiling Point (℃)||-185,9 °C|
|Heat Capacity||0.52 J/g · K|
|State at STP||Gas|
|Electronegativity (Pauling) χ||no data|
|Ionization Energy (eV)||15.75962|
|Van der Waals Radius||188|
|Year of Discovery||1894|
|Discoverer||Ramsay and Rayleigh|
What is the Boiling Point of Argon?
Argon boiling point is -185,9 °C. Boiling point of Argon in Kelvin is 87.3 K.
What is the Melting Point of Argon?
Argon melting point is -189,4 °C. Melting point of Argon in Kelvin is 83.8 K.
How Abundant is Argon?
Abundant value of Argon is 3.5 mg/kg.
Argon Atom Model
What is the State of Argon at Standard Temperature and Pressure (STP)?
State of Argon is Gas at standard temperature and pressure at 0℃ and one atmosphere pressure.
When was Argon Discovered?
Argon was discovered in 1894.