Table of Ionization
Energies (kJ mol-1)
For
the process X(g) 
X+(g) + e-
|
|
Li
|
Be
|
B
|
C
|
N
|
O
|
F
|
|
1st
|
520
|
900
|
801
|
1086
|
1400
|
1310
|
1680
|
|
2nd
|
|
1800
|
2427
|
2353
|
2900
|
3400
|
3400
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Si
|
P
|
S
|
Cl
|
|
1st
|
|
|
|
790
|
1010
|
1000
|
1260
|
|
2nd
|
|
|
|
1600
|
1900
|
2300
|
2300
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As
|
Se
|
Br
|
|
|
|
|
|
|
950
|
940
|
1140
|
|
|
|
|
|
|
1800
|
2100
|
2100
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Te
|
I
|
|
1st
|
|
|
|
|
|
870
|
1010
|
|
2nd
|
|
|
|
|
|
1800
|
1800
|
|
|
|
|
|
|
|
|
|
|
|
|
B
|
Al
|
Sc
|
C
|
Zr
|
|
1st
|
|
|
801
|
578
|
631
|
1086
|
660
|
|
2nd
|
|
|
2427
|
1817
|
1235
|
2353
|
1267
|
|
3rd
|
|
|
3660
|
2745
|
2389
|
4621
|
2218
|
|
4th
|
|
|
|
|
|
6223
|
3313
|
|
|
|
|
|
|
|
|
|
|
|
Ca
|
Zn
|
Hg
|
Se
|
Te
|
Br
|
|
1st
|
|
590
|
906
|
1010
|
941
|
869
|
1140
|
|
2nd
|
|
1145
|
1733
|
1800
|
2045
|
1790
|
2100
|