44  Ruthenium

 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      

+--------------------+
| 44  ____           |
|    |  _ \ _   _    |
|    | |_) | | | |   |
|    |  _ <| |_| |   |
|    |_| \_\\__,_|   |
|                    |
|      Ruthenium     |
|       101.1 u      |
+--------------------+

Electron Configuration: [Kr]5s1 4d7
Electronegativity:      2.2
Atomic Radius:          207 pm
Ionization Energy:      7.361 eV
Electron Affinity:      1.05 eV
Oxidation States:       3
Standard State:         Solid
Melting Point:          2607 K
Boiling Point:          4423 K
Density:                12.1 g/cm3
Family:                 Transition metal
Year Discovered:        1827
Number of Neutrons:     57
Number of Protons:      44
Number of Electrons:    44
Number of Valence:      
Valency:                
Group:                  8
Period:                 5
Shell:                  d-shell
Specific Heat:          0.238 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Merging neutron stars