9  Fluorine

 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      

+--------------------+
|  9     _____       |
|       |  ___|      |
|       | |_         |
|       |  _|        |
|       |_|          |
|                    |
|      Fluorine      |
|    18.99840316 u   |
+--------------------+

Electron Configuration: [He]2s2 2p5
Electronegativity:      3.98
Atomic Radius:          135 pm
Ionization Energy:      17.423 eV
Electron Affinity:      3.339 eV
Oxidation States:       -1
Standard State:         Gas
Melting Point:          53.53 K
Boiling Point:          85.03 K
Density:                0.001696 g/cm3
Family:                 Halogen
Year Discovered:        1670
Number of Neutrons:     10
Number of Protons:      9
Number of Electrons:    9
Number of Valence:      7
Valency:                1
Group:                  17
Period:                 2
Shell:                  p-shell
Specific Heat:          0.824 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying high-mass stars