43  Technetium

 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      

+--------------------+
| 43   _____         |
|     |_   _|__      |
|       | |/ __|     |
|       | | (__      |
|       |_|\___|     |
|                    |
|     Technetium     |
|     96.90636 u     |
+--------------------+

Electron Configuration: [Kr]5s2 4d5
Electronegativity:      1.9
Atomic Radius:          209 pm
Ionization Energy:      7.28 eV
Electron Affinity:      0.55 eV
Oxidation States:       +7, +6, +4
Standard State:         Solid
Melting Point:          2430 K
Boiling Point:          4538 K
Density:                11 g/cm3
Family:                 Transition metal
Year Discovered:        1937
Number of Neutrons:     55
Number of Protons:      43
Number of Electrons:    43
Number of Valence:      
Valency:                
Group:                  7
Period:                 5
Shell:                  d-shell
Specific Heat:          
Radioactive:            1
Occurrence:             Rare
Source:                 Radioactive decay