Table 1.

Selected physical and electronic properties of some common gases.

Property	O2 [a]	N2 [a]	CO2 [a]	Ar[a]
Kinetic diameter [Å]	3.46	3.64	3.3	3.4
Dipole moment	0	0	0	0
Quadrupole moment 1040 θ [cm2]	1.3	4.7	13.4	0
Polarisability [Å]	1.60	1.76	2.65	1.66
Reduction energy [kJ mol−1]	4.1	241.5	351.4	331.6

[a] Nat. Chem. 2010, 2, 633–637.