39  Yttrium

 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      

+--------------------+
| 39    __   __      |
|       \ \ / /      |
|        \ V /       |
|         | |        |
|         |_|        |
|                    |
|       Yttrium      |
|     88.90584 u     |
+--------------------+

Electron Configuration: [Kr]5s2 4d1
Electronegativity:      1.22
Atomic Radius:          219 pm
Ionization Energy:      6.217 eV
Electron Affinity:      0.307 eV
Oxidation States:       3
Standard State:         Solid
Melting Point:          1795 K
Boiling Point:          3618 K
Density:                4.47 g/cm3
Family:                 Transition metal
Year Discovered:        1794
Number of Neutrons:     50
Number of Protons:      39
Number of Electrons:    39
Number of Valence:      
Valency:                
Group:                  3
Period:                 5
Shell:                  d-shell
Specific Heat:          0.298 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying low-mass stars