Electron Affinity of the Elements

Improved values in table 5.1 of Physics Handbook (edition 6)

The electron affinity is the energy released when a neutral atom accepts an electron, forming a monovalent negative ion. The electron affinity for most of the rare earths, which are marked with an asterisk, is 0.2 – 0.5 eV. The uncertainty of the values below is at most 9 units in the last digit.

 
 
 
Element   Sym-   Atomic     Electron
    bol   number   affinity
            eV
 
 
 
actinium Ac 89
aluminium   Al   13   0.4411
americium   Am   95    
antimony   Sb   51   1.075
argon   Ar   18   < 0
arsenic   As   33   0.813
astatine   At   85   2.82
barium   Ba   56   0.144626
berkerlium   Bk   97    
beryllium   Be   4   < 0
bismuth   Bi   83   0.9461
bohrium   Bh   107    
boron   B   5   0.2771
bromine   Br   35   3.3653
cadmium   Cd   48   < 0
calcium   Ca   20   0.024551
californium   Cf   98    
carbon   C   6   1.26293
cerium   Ce   58   *
cesium   Cs   55   0.471630
chlorine   Cl   17   3.6173
chromium   Cr   24   0.6661
cobalt   Co   27   0.6611
copper   Cu   29   1.2281
curium   Cm   96    
dubnium   Db   105    
dysprosium   Dy   66   *
einsteinium   Es   99    
erbium   Er   68   *
europium   Eu   63   *
fermium   Fm   100    
fluorine   F   9   3.3993
francium   Fr   87    
gadolinium   Gd   64   *
gallium   Ga   31   0.302
germanium   Ge   32   1.22
gold   Au   79   2.308633
hafnium   Hf   72   » 0
hassium   Hs   108    
helium   He   2   < 0
holmium   Ho   67   *
hydrogen   H   1   0.754209
indium   In   49   0.32
iodine   I   53   3.05914
iridium   Ir   77   1.5658
iron   Fe   26   0.1634
krypton   Kr   36   < 0
lanthanum   La   57   0.53
lawrencium   Lr   103    
lead   Pb   82   0.3648
lithium   Li   3   0.61805
lutetium   Lu   71   *
magnesium   Mg   12   < 0
manganese   Mn   25   < 0
meitnerium   Mt   109  
mendelevium   Md   101    
mercury   Hg   80   < 0
molybdenum   Mo   42   0.7461
neodymium   Nd   60   *
neon   Ne   10   < 0
neptunium   Np   93    
nickel   Ni   28   1.1561
niobium   Nb   41   0.8933
nitrogen   N   7   – 0.072
nobelium   No   102    
osmium   Os   76   1.12
oxygen   O   8   1.4611215
palladium   Pd   46   0.5578
phosphorus   P   15   0.74653
platinum   Pt   78   2.1282
plutonium   Pu   94    
polonium   Po   84   1.93
potassium   K   19   0.501471
praseodymium   Pr   59   *
prometium   Pm   61   *
protactinium   Pa   91  
radium   Ra   88  
radon   Rn   86   < 0
rhehnium   Re   75   0.152
rhodium   Rh   45   1.1378
rubidium   Rb   37   0.485922
ruthenium   Ru   44   1.052
rutherfordium   Rf   104    
samarium   Sm   62   *
scandium   Sc   21   0.1882
seaborgium   Sg   106  
selenium   Se   34   2.020693
silicon   Si   14   1.3855
silver   Ag   47   1.3027
sodium   Na   11   0.5479303
strontium   Sr   38   0.052066
sulphur   S   16   2.077120
tantalum   Ta   73   0.3221
technetium   Tc   43   0.552
tellurium   Te   52   1.97083
terbium   Tb   65   *
thallium   Tl   81   0.22
thorium   Th   90  
thulium   Tm   69   *
tin   Sn   50   1.22
titanium   Ti   22   0.0791
tungsten   W   74   0.8158
uranium   U   92  
vanadium   V   23   0.5251
xenon   Xe   54   < 0
ytterbium   Yb   70   *
yttrium   Y   39   0.3071
zinc   Zn   30   < 0
zirconium   Zr   40   0.4261


Updated March 13th, 1999
By Jonny Österman
Email: asystem@asystem.se