Oxygen | SSHADE

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Name: Oxygen

Name and identifiers

IUPAC name: Oxygen
InChI: InChI=1S/O
InChI key: QVGXLLKOCUKJST-UHFFFAOYSA-N
CAS number: 17778-80-2
Comments: natural O - 99.76% 16O + 0.2% 18O + 0.04% 17O

Symbol and fundamental properties

Symbol: O
Formula: $O$
Charge: 0
Atomic number Z: 8

Molar mass: 15.9994 $g/mol$
State STP: gas
Electronegativity: 3.44

Isotopic composition

Isotope mixture type

terrestrial abundance

Isotopes

	IUPAC Name	A	Mole fraction
	Oxygen-16	16	0.99757
	Oxygen-17	17	0.00038
	Oxygen-18	18	0.00205

X-ray absorption edges

Type	K	L1	L2	L3
Energy (keV)	0.532	0.0237	0.0071	0.0071