### Elements Ordered by Atomic Number

    1   Hydrogen     34  Selenium     67  Holmium
    2   Helium       35  Bromine      68  Erbium
    3   Lithium      36  Krypton      69  Thulium
    4   Beryllium    37  Rubidium     70  Ytterbium
    5   Boron        38  Strontium    71  Lutetium
    6   Carbon       39  Yttrium      72  Hafnium
    7   Nitrogen     40  Zirconium    73  Tantalum
    8   Oxygen       41  Niobium      74  Tungsten
    9   Fluorine     42  Molybdenum   75  Rhenium
    10  Neon         43  Technetium   76  Osmium
    11  Sodium       44  Ruthenium    77  Iridium
    12  Magnesium    45  Rhodium      78  Platinum
    13  Aluminum     46  Palladium    79  Gold
    14  Silicon      47  Silver       80  Mercury
    15  Phosphorus   48  Cadmium      81  Thallium
    16  Sulfur       49  Indium       82  Lead
    17  Chlorine     50  Tin          83  Bismuth
    18  Argon        51  Antimony     84  Polonium
    19  Potassium    52  Tellurium    85  Astatine
    20  Calcium      53  Iodine       86  Radon
    21  Scandium     54  Xenon        87  Francium
    22  Titanium     55  Cesium       88  Radium
    23  Vanadium     56  Barium       89  Actinium
    24  Chromium     57  Lanthanum    90  Thorium
    25  Manganese    58  Cerium       91  Protactinium
    26  Iron         59  Praseodymium 92  Uranium
    27  Cobalt       60  Neodymium    93  Neptunium
    28  Nickel       61  Promethium   94  Plutonium
    29  Copper       62  Samarium     95  Americium
    30  Zinc         63  Europium     96  Curium
    31  Gallium      64  Gadolinium   97  Berkelium
    32  Germanium    65  Terbium      98  Californium
    33  Arsenic      66  Dysprosium   99  Einsteinium