Periodic_Table

A listing of the different elements, arranged by electronic structure so that many chemical properties vary regularly across the table.  With horizontal and vertical reversed from the normal orientation:

              Period
  1    2    3    4    5    6    7
                                      Group
  [[Hydrogen|H]]  [[Lithium|Li]]  [[Sodium|Na]]   [[Potassium|K]]  [[Rubidium|Rb]]  [[Cesium|Cs]]  [[Francium|Fr]]    1 (IA)
      [[Beryllium|Be]]  [[Magnesium|Mg]]  [[Calcium|Ca]]  [[Strontium|Sr]]  [[Barium|Ba]]  [[Radium|Ra]]    2 (IIA)
                          [[Lanthanum|La]]  [[Actinium|Ac]]
                          [[Cerium|Ce]]  [[Thorium|Th]]
                          [[Praseodymium|Pr]]  [[Protactinium|Pa]]
                          [[Neodymium|Nd]]   [[Uranium|U]]
                          [[Promethium|Pm]]  [[Neptunium|Np]]
                          [[Samarium|Sm]]  [[Plutonium|Pu]]
                          [[Europium|Eu]]  [[Americium|Am]]
                          [[Gadolinium|Gd]]  [[Curium|Cm]]
                          [[Terbium|Tb]]  [[Berkelium|Bk]]
                          [[Dysprosium|Dy]]  [[Californium|Cf]]
                          [[Holmium|Ho]]  [[Einsteinium|Es]]
                          [[Erbium|Er]]  [[Fermium|Fm]]    :
                          [[Thulium|Tm]]  [[Mendelevium|Md]]    :
                          [[Ytterbium|Yb]]  [[Nobelium|No]]    :
                [[Scandium|Sc]]   [[Yttrium|Y]]  [[Lutetium|Lu]]  [[Lawrencium|Lr]]    3 (IIIB)
                [[Titanium|Ti]]  [[Zirconium|Zr]]  [[Hafnium|Hf]]  [[Unnilquadium|Unq]]   4 (IVB)
                 [[Vanadium|V]]  [[Niobium|Nb]]  [[Tantalum|Ta]]  [[Unnilpentium|Unp]]   5 (VB)
                [[Chromium|Cr]]  [[Molybdenum|Mo]]   [[Tungsten|W]]  [[Unnilhexium|Unh]]   6 (VIB)
                [[Manganese|Mn]]  [[Technetium|Tc]]  [[Rhenium|Re]]  [[Unnilseptium|Uns]]   7 (VIIB)
                [[Iron|Fe]]  [[Ruthenium|Ru]]  [[Osmium|Os]]  [[Unniloctium|Uno]]   8 (VIIIB)
                [[Cobalt|Co]]  [[Rhodium|Rh]]  [[Iridium|Ir]]  [[Unnilennium|Une]]   9 (VIIIB)
                [[Nickel|Ni]]  [[Palladium|Pd]]  [[Platinum|Pt]]        10 (VIIIB)
                [[Copper|Cu]]  [[Silver|Ag]]  [[Gold|Au]]        11 (IB)
                [[Zinc|Zn]]  [[Cadmium|Cd]]  [[Mercury|Hg]]        12 (IIB)
       [[Boron|B]]  [[Aluminum|Al]]  [[Gallium|Ga]]  [[Indium|In]]  [[Thalium|Tl]]        13 (IIIA)
       [[Carbon|C]]  [[Silicon|Si]]  [[Germanium|Ge]]  [[Tin|Sn]]  [[Lead|Pb]]        14 (IVA)
       [[Nitrogen|N]]   [[Phosphorus|P]]  [[Arsenic|As]]  [[Antimony|Sb]]  [[Bismuth|Bi]]        15 (VA)
       [[Oxygen|O]]   [[Sulphur|S]]  [[Selenium|Se]]  [[Tellurium|Te]]  [[Polonium|Po]]        16 (VIA)
       [[Fluorine|F]]  [[Chlorine|Cl]]  [[Bromine|Br]]   [[Iodine|I]]  [[Astatine|At]]        17 (VIIA)
 [[Helium|He]]  [[Neon|Ne]]  [[Argon|Ar]]  [[Krypton|Kr]]  [[Xenon|Xe]]  [[Radon|Rn]]        18 (VIIIA)