64  Gadolinium

 H                                                  He
 Li Be                               B  C  N  O  F  Ne
 Na Mg                               Al Si P  S  Cl Ar
 K  Ca Sc Ti V  Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
 Rb Sr Y  Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I  Xe
 Cs Ba La Hf Ta W  Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
                                                      
       Ce Pr Nd Pm Sm Eu[Gd]Tb Dy Ho Er Tm Yb Lu      
       Th Pa U  Np Pu Am Cm Bk Cf Es Fm Md No Lr      

+--------------------+
| 64   ____     _    |
|     / ___| __| |   |
|    | |  _ / _` |   |
|    | |_| | (_| |   |
|     \____|\__,_|   |
|                    |
|     Gadolinium     |
|       157.2 u      |
+--------------------+

Electron Configuration: [Xe]6s2 4f7 5d1
Electronegativity:      1.2
Atomic Radius:          237 pm
Ionization Energy:      6.150 eV
Electron Affinity:      
Oxidation States:       3
Standard State:         Solid
Melting Point:          1586 K
Boiling Point:          3546 K
Density:                7.90 g/cm3
Family:                 Lanthanide
Year Discovered:        1880
Number of Neutrons:     93
Number of Protons:      64
Number of Electrons:    64
Number of Valence:      
Valency:                
Group:                  
Period:                 6
Shell:                  f-shell
Specific Heat:          0.236 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Merging neutron stars