H2+ ion Hydrogen molecular ion.
The only electron is in the bonding als orbital \ s Is1
Bond order = =
There is one unpaired electron
\ Para magnetic
He2 molecule
4 electrons s Is2 *s Is2
b.o.= = 0
\ No stable molecule
He2+ ion
3 electrons
s Is2*s Is2 \ Paramagnetic.
Li2 molecule
6 electrons.
s Is2 *s Is2 s 2s2 b.o = = 1
No impaired electron \ Diamagnetic
Be2 molecule
8 Electrons
s Is2 *s Is2 s 2s2*s 2s2
b. o = = 0 No stable molecule
B2 molecule
10 electrons
s Is2 *s Is2 s 2s2*s 2s2 s 2px2
b.o. = = 1 Diamagnetic
C2 molecule
12 electrons
s Is2 *s Is2 s 2s2*s 2s2 s 2px2 P2 Py1 = P 2Pz1
b.o. = = 2
Contains unpaired electrons \ Para magnetic
N2 molecule
14 electrons
s Is2 *s Is2 s 2s2 *s 2s2 s 2px2 P2 Py2 = P 2Pz2
b.o. = = 3 Diamagnetic
O2 molecule
16 electrons
sIs2 *sIs2 s2s2 *s2s2 s2px2 P2 Py2 = P 2Pz2 *P2Py1 = *s2pz1
b.o. = = 2
There are two unpaired electrons and the molecule is paraimagnetic
F2 molecule
18 electrons
sIs2 *sIs2 s2s2 *s2s2 s2px2 P2 Py2 = P 2Pz2 *P2Py2 = *P2Pz2
b.o. = = 1
Diamagnetic
Ne2 molecule
20 electrons
sIs2 *sIs2 s2s2 *s2s2 s2px2 P2 Py2 = P 2Pz2 *P2P2y = P2P2z *P2P2x
b. o. = = 0