73  Tantalum

 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      

+--------------------+
| 73   _____         |
|     |_   _|_ _     |
|       | |/ _` |    |
|       | | (_| |    |
|       |_|\__,_|    |
|                    |
|      Tantalum      |
|     180.9479 u     |
+--------------------+

Electron Configuration: [Xe]6s2 4f14 5d3
Electronegativity:      1.5
Atomic Radius:          217 pm
Ionization Energy:      7.89 eV
Electron Affinity:      0.322 eV
Oxidation States:       5
Standard State:         Solid
Melting Point:          3290 K
Boiling Point:          5731 K
Density:                16.4 g/cm3
Family:                 Transition metal
Year Discovered:        1802
Number of Neutrons:     108
Number of Protons:      73
Number of Electrons:    73
Number of Valence:      
Valency:                
Group:                  5
Period:                 6
Shell:                  d-shell
Specific Heat:          0.140 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying low-mass stars
Source:                 Merging neutron stars