40  Zirconium

 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      

+--------------------+
| 40   _____         |
|     |__  /_ __     |
|       / /| '__|    |
|      / /_| |       |
|     /____|_|       |
|                    |
|      Zirconium     |
|       91.22 u      |
+--------------------+

Electron Configuration: [Kr]5s2 4d2
Electronegativity:      1.33
Atomic Radius:          186 pm
Ionization Energy:      6.634 eV
Electron Affinity:      0.426 eV
Oxidation States:       4
Standard State:         Solid
Melting Point:          2128 K
Boiling Point:          4682 K
Density:                6.52 g/cm3
Family:                 Transition metal
Year Discovered:        1789
Number of Neutrons:     51
Number of Protons:      40
Number of Electrons:    40
Number of Valence:      
Valency:                
Group:                  4
Period:                 5
Shell:                  d-shell
Specific Heat:          0.278 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying low-mass stars