Shell: p-block

 .                                                  ..
 .. ..                               B  C  N  O  F  Ne
 .. ..                               Al Si P  S  Cl Ar
 .  .. .. .. .  .. .. .. .. .. .. .. Ga Ge As Se Br Kr
 .. .. .  .. .. .. .. .. .. .. .. .. In Sn Sb Te I  Xe
 .. .. .. .. .. .  .. .. .. .. .. .. Tl Pb Bi Po At Rn
 .. .. .. .. .. .. .. .. .. .. .. .. Nh Fl Mc Lv Ts Og
                                                      
       .. .. .. .. .. .. .. .. .. .. .. .. .. ..      
       .. .. .  .. .. .. .. .. .. .. .. .. .. ..      

The p-block consists elements in Groups 13 to 18 but not Helium. The 
valence electrons of these elements are in the p-shell. This 
dumb-bell shaped shell holds at most 6 electrons, and has an 
azimuthal quantum number of 1. The "p" stands for "principal".

  5 B  Boron
  6 C  Carbon
  7 N  Nitrogen
  8 O  Oxygen
  9 F  Fluorine
 10 Ne Neon
 13 Al Aluminum
 14 Si Silicon
 15 P  Phosphorus
 16 S  Sulfur
 17 Cl Chlorine
 18 Ar Argon
 31 Ga Gallium
 32 Ge Germanium
 33 As Arsenic
 34 Se Selenium
 35 Br Bromine
 36 Kr Krypton
 49 In Indium
 50 Sn Tin
 51 Sb Antimony
 52 Te Tellurium
 53 I  Iodine
 54 Xe Xenon
 81 Tl Thallium
 82 Pb Lead
 83 Bi Bismuth
 84 Po Polonium
 85 At Astatine
 86 Rn Radon
113 Nh Nihonium
114 Fl Flerovium
115 Mc Moscovium
116 Lv Livermorium
117 Ts Tennessine
118 Og Oganesson