Argon
18
Ar
Groep
18
Periode
3
Blok
p
Protrone
Elektrone
Neutrone
18
18
22
Algemene Eienskappe
Atoom Nommer
18
Atoommassa
39,948
Massa Nommer
40
Kategorie
Edelgasse
Kleur
Kleurloos
Radioaktief
Nee
From the Greek argos, inactive
Kristalstruktuur
Gesiggesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 8
Elektronkonfigurasie
[Ne] 3s2 3p6
Argon makes a distinctive blue-green gas laser
Fisiese Eienskappe
Fase
Gas
Digtheid
0,0017837 g/cm3
Smeltpunt
83,8 K | -189,35 °C | -308,83 °F
Kookpunt
87,3 K | -185,85 °C | -302,53 °F
Heat of Fusion
1,18 kJ/mol
Heat of Vaporization
6,5 kJ/mol
Spesifieke Hitte Kapasiteit
0,52 J/g·K
Oorvloed in die aardkors
0,00015%
Oorvloed in die heelal
0,02%
CAS Nommer
7440-37-1
PubChem CID Nommer
23968
Atomiese Eienskappe
Atoom radius
71 pm
Kovalente Radius
106 pm
Elektronegatiewiteit
-
Ionisasie potensiaal
15,7596 eV
Atoom volume
22,4 cm3/mol
Termiese geleidingsvermoë
0,0001772 W/cm·K
Oksidasiestate
0
Toepassings
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
Isotope
Stabiele Isotope
36Ar, 38Ar, 40ArOnstabiele Isotope
30Ar, 31Ar, 32Ar, 33Ar, 34Ar, 35Ar, 37Ar, 39Ar, 41Ar, 42Ar, 43Ar, 44Ar, 45Ar, 46Ar, 47Ar, 48Ar, 49Ar, 50Ar, 51Ar, 52Ar, 53Ar