3  Lithium

 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      

+--------------------+
|  3    _     _      |
|      | |   (_)     |
|      | |   | |     |
|      | |___| |     |
|      |_____|_|     |
|                    |
|       Lithium      |
|        7.0 u       |
+--------------------+

Electron Configuration: [He]2s1
Electronegativity:      0.98
Atomic Radius:          182 pm
Ionization Energy:      5.392 eV
Electron Affinity:      0.618 eV
Oxidation States:       1
Standard State:         Solid
Melting Point:          453.65 K
Boiling Point:          1615 K
Density:                0.534 g/cm3
Family:                 Alkali metal
Year Discovered:        1817
Number of Neutrons:     4
Number of Protons:      3
Number of Electrons:    3
Number of Valence:      1
Valency:                1
Group:                  1
Period:                 2
Shell:                  s-shell
Specific Heat:          3.582 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying low-mass stars