Argon | SSHADE

Atom

Name: Argon

Name and identifiers

IUPAC name: Argon
InChI: InChI=1S/Ar
InChI key: XKRFYHLGVUSROY-UHFFFAOYSA-N
CAS number: 7440-37-1
Comments: natural Ar - 99.6% 40Ar + 0.33% 36Ar

Symbol and fundamental properties

Symbol: Ar
Formula: $Ar$
Charge: 0
Atomic number Z: 18
Nuclear spin I: 0

Molar mass: 39.948 $g/mol$
State STP: gas
Electronegativity: 0.0

Isotopic composition

Isotope mixture type

terrestrial abundance

Isotopes

	IUPAC Name	A	Mole fraction
	Argon-36	36	0.003336
	Argon-38	38	0.000629
	Argon-40	40	0.996035

X-ray absorption edges

Type	K	L1	L2	L3	M1
Energy (keV)	3.2029	0.32	0.2473	0.2452	0.0293