21  Scandium

 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      

+--------------------+
| 21  ____           |
|    / ___|  ___     |
|    \___ \ / __|    |
|     ___) | (__     |
|    |____/ \___|    |
|                    |
|      Scandium      |
|     44.95591 u     |
+--------------------+

Electron Configuration: [Ar]4s2 3d1
Electronegativity:      1.36
Atomic Radius:          211 pm
Ionization Energy:      6.561 eV
Electron Affinity:      0.188 eV
Oxidation States:       3
Standard State:         Solid
Melting Point:          1814 K
Boiling Point:          3109 K
Density:                2.99 g/cm3
Family:                 Transition metal
Year Discovered:        1879
Number of Neutrons:     24
Number of Protons:      21
Number of Electrons:    21
Number of Valence:      
Valency:                
Group:                  3
Period:                 4
Shell:                  d-shell
Specific Heat:          0.568 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying high-mass stars