Argon
18
Ar
Guruh
18
Davr
3
Block
p
Protonlar
Elektronlar
Neytronlar
18
18
22
General Properties
Atom raqami
18
Atom massasi
39,948
Mass Number
40
Turkum
Inert gazlar
Ranggi
Rangsiz
Radioaktivlik
Yoʻq
From the Greek argos, inactive
Crystal Structure
Face Centered Cubic
Tarix
Argon was suspected to be present in air by Henry Cavendish in 1785.
It was not isolated until 1894 by Lord Rayleigh and Sir William Ramsay in Scotland.
Argon became the first member of the noble gases to be discovered.
In 1957, IUPAC agreed that the symbol should change from A to Ar.
It was not isolated until 1894 by Lord Rayleigh and Sir William Ramsay in Scotland.
Argon became the first member of the noble gases to be discovered.
In 1957, IUPAC agreed that the symbol should change from A to Ar.
Electrons per shell
2, 8, 8
Elektron konfiguratsiyasi
[Ne] 3s2 3p6
Argon makes a distinctive blue-green gas laser
Physical Properties
Phase
Gas
Zichlik
0,0017837 g/cm3
Erish harorati
83,8 K | -189,35 °C | -308,83 °F
Qaynash harorati
87,3 K | -185,85 °C | -302,53 °F
Heat of Fusion
1,18 kJ/mol
Heat of Vaporization
6,5 kJ/mol
Solishtirma issiqlik sigʻimi
0,52 J/g·K
Abundance in Earth's crust
0,00015%
Abundance in Universe
0,02%
CAS Number
7440-37-1
PubChem CID Number
23968
Atomic Properties
Atom radiusi
71 pm
Kovalentlik radiusi
106 pm
Elektrmanfiylik
-
Ionization Potential
15,7596 eV
Molyar hajm
22,4 cm3/mol
Issiqlik oʻtkazuvchanlik
0,0001772 W/cm·K
Oksidlanish darajasi
0
Applications
Argon gas is used to fill conventional incandescent and fluorescent light bulbs.
Argon is also used as an inert gas shield for arc welding and cutting, as blanket for the production of titanium and other reactive elements.
It is used as a protective atmosphere for growing silicon and germanium crystals.
Argon is also used as an inert gas shield for arc welding and cutting, as blanket for the production of titanium and other reactive elements.
It is used as a protective atmosphere for growing silicon and germanium crystals.
Argon is considered to be non-toxic
Izotoplar
Barqaror izotoplar
36Ar, 38Ar, 40ArBeqaror izotoplar
30Ar, 31Ar, 32Ar, 33Ar, 34Ar, 35Ar, 37Ar, 39Ar, 41Ar, 42Ar, 43Ar, 44Ar, 45Ar, 46Ar, 47Ar, 48Ar, 49Ar, 50Ar, 51Ar, 52Ar, 53Ar