Table 1. Compatibility of even-odd rule with Lewis-octet rule. Names, formulas and structural formulas of uncharg- ed single-bonded molecules are classified by the atoms num- ber. All molecules, stable in the gas phase, are composed of atoms from the main group of elements and are interconnected to each of their first neighbor by only one covalent bond. All left side numbers come from Mendeleev pe- riodic table and all right side numbers are equal to eight except for hydrogen with a left-side number of 2 according to Lewis-octet rule.			Table 2. Molecules following only the even-odd rule. Names, formulas and structural formulas of uncharged single-bonded molecules are classified by the atoms number. All molecules are stable in the gas phase and all atoms belong to the main group of elements and are interconnected to each of their first neighbor by only one covalent bond. All left side numbers originate from Mendeleev periodic table and are from 1 for Lithium (Li) to 8 for Xenon (Xe) and right side numbers from 2 to 14, are calculated using the even-odd rule defined above.

Two atoms			Two atoms
H2 Di-hydrogen Sol Liq Gas	[9] p.B94		Li2 Di-lithium Sol Liq Gas	[9] p.B103
Cl2 Di-chlorine Sol Liq Gas	[9] p.B83		KCl Potassium chloride Sol Liq Gas	[9] p.B121
HCl Chloridric acid Sol Liq Gas	[9] p.B95
Three atoms			Three atoms
H2O Water Hydrogen oxide Sol Liq Gas	[9] p.B95		BeF2 Beryllium fluoride Sol Liq Gas	[9] p.72
Cl2S Sulfur dichloride Dichlorosulfane Sol Liq Gas	[10] -[12]		H2C Carbene radical Or Methylene Gas only	[10] -[12]
			SnCl2 Tin(II) chloride Sol Liq Gas	[10] -[12]
			XeF2 Xenon difluoride Sol Liq Gas	[10] -[12]
			XeF2 Xenon difluoride Sol Liq Gas	[10] -[12]
Four atoms			Four atoms
F2O2 Dioxygen difluoride Sol Liq Gas	[10] -[12]		BF3 Boron trifluoride Sol Liq Gas	[9] p.B74
NF3 Nitrogen trifluoride Sol Liq Gas	[9] p.B115		ClF3 Chlorine trifluoride Sol Liq Gas	[9] p.B83
PH3 Phosphine Sol Liq Gas	[9] p.B117
Five atoms			Five atoms
SiBr4 Silicon tetrabromide Sol Liq Gas	[9] p.B132		XeF4 Xenon tetrafluoride Sol Gas	[10] -[12]
CH4 Methane Sol Liq Gas	Same structure		SF4 Sulfur tetrafluoride Sol Liq Gas	[9] p.B143
Six atoms			Six atoms
CH4S Methanethiol Sol Liq Gas	[9] p.C374		B2F4 Diboron tetrafluoride Sol Liq Gas	[10] -[12]
N2F4 Tetrafluorohydrazine Sol Liq Gas	[10] -[12]		PF5 Phosphorus pentafluoride Sol Liq Gas	[9] p.B117
N2H4 Hydrazine Sol Liq Gas	Same structure [10] -[12]
Seven atoms			Seven atoms
C2H4O H4C2O Ethylene oxide Sol Liq Gas	[9] p.C287, [13]		SF6 Sulfur hexafluoride Sol Liq Gas	[9] p.B143
CH4O2 Methanediol Sol Liq Gas	[9] p.C339		XeF6 Xenon hexafluoride Sol Liq Gas [12]	[10] -[12]
CH3NH2 Methylamine Sol Liq Gas	[9] p.C365		BH3O3 Boric acid [9] p.B74
Eight atoms			Eight atoms
C2H6 Ethane Sol Liq Gas	[9] p.C284		IF7 Iodine heptafluoride Sol Liq Gas	[9] p.B96
More than eight			More than eight
C3H6O2 Dioxolane Sol Liq Gas	[9] p.C271		S2F10 Disulfur decafluoride Sol Liq Gas	[9] p.B143
C4H10N2 Piperazine Sol Liq Gas [9] p.C434
C6H12 Cyclohexane Sol Liq Gas [12] [9] p.C254
C3H2ClF5O Isoflurane Sol Liq Gas [10] -[12]
C2H8N2 1,1-Dimethylhydrazine Sol Liq Gas
C2H8N2 1,2-Dimethylhydrazine Sol Liq Gas [9] p.C337