Chemical Elements
| Periodic Number | Symbol | Name | Avg. Mass | Stable | Known Isotopes | Most Abundant Isotope |
| 1 | H | Hydrogen | 1.00794 | yes | 6 | 1H |
| 2 | He | Helium | 4.002602 | yes | 8 | 4He |
| 3 | Li | Lithium | 6.941 | yes | 9 | 7Li |
| 4 | Be | Beryllium | 9.012182 | yes | 10 | 9Be |
| 5 | B | Boron | 10.811 | yes | 13 | 11B |
| 6 | C | Carbon | 12.0107 | yes | 15 | 12C |
| 7 | N | Nitrogen | 14.0067 | yes | 15 | 14N |
| 8 | O | Oxygen | 15.9994 | yes | 15 | 16O |
| 9 | F | Fluorine | 18.9984032 | yes | 16 | 19F |
| 10 | Ne | Neon | 20.1797 | yes | 17 | 20Ne |
| 11 | Na | Sodium | 22.98977 | yes | 18 | 23Na |
| 12 | Mg | Magnesium | 24.305 | yes | 18 | 24Mg |
| 13 | Al | Aluminium | 26.981538 | yes | 19 | 27Al |
| 14 | Si | Silicon | 28.0855 | yes | 21 | 28Si |
| 15 | P | Phosphorus | 30.973761 | yes | 23 | 31P |
| 16 | S | Sulfur | 32.065 | yes | 24 | 32S |
| 17 | Cl | Chlorine | 35.453 | yes | 24 | 35Cl |
| 18 | Ar | Argon | 39.948 | yes | 24 | 40Ar |
| 19 | K | Potassium | 39.0983 | yes | 24 | 39K |
| 20 | Ca | Calcium | 40.078 | yes | 24 | 40Ca |
| 21 | Sc | Scandium | 44.95591 | yes | 24 | 45Sc |
| 22 | Ti | Titanium | 47.867 | yes | 24 | 48Ti |
| 23 | V | Vanadium | 50.9415 | yes | 24 | 51V |
| 24 | Cr | Chromium | 51.9961 | yes | 24 | 52Cr |
| 25 | Mn | Manganese | 54.938049 | yes | 24 | 55Mn |
| 26 | Fe | Iron | 55.845 | yes | 25 | 56Fe |
| 27 | Co | Cobalt | 58.9332 | yes | 25 | 59Co |
| 28 | Ni | Nickel | 58.6934 | yes | 29 | 58Ni |
| 29 | Cu | Copper | 63.546 | yes | 29 | 63Cu |
| 30 | Zn | Zinc | 58.6934 | yes | 29 | 64Zn |
| 31 | Ga | Gallium | 69.7236 | yes | 29 | 69Ga |
| 32 | Ge | Germanium | 72.64 | yes | 29 | 74Ge |
| 33 | As | Arsenic | 74.9216 | yes | 30 | 75As |
| 34 | Se | Selenium | 78.96 | yes | 28 | 80Se |
| 35 | Br | Bromine | 79.904 | yes | 28 | 79Br |
| 36 | Kr | Krypton | 83.798 | yes | 29 | 84Kr |
| 37 | Rb | Rubidium | 85.4678 | yes | 32 | 85Rb |
| 38 | Sr | Strontium | 87.62 | yes | 32 | 86Sr |
| 39 | Y | Yttrium | 88.90585 | yes | 30 | 89Y |
| 40 | Zr | Zirconium | 91.224 | yes | 30 | 90Zr |
| 41 | Nb | Niobium | 92.90638 | yes | 30 | 93Nb |
| 42 | Mo | Molybdenum | 95.94 | yes | 31 | 98Mo |
| 43 | Tc | Technetium | 98.0 | no | 31 | - |
| 44 | Ru | Ruthenium | 101.07 | yes | 32 | 102Ru |
| 45 | Rh | Rhodium | 102.9055 | yes | 33 | 103Rh |
| 46 | Pd | Palladium | 106.42 | yes | 33 | 106Pd |
| 47 | Ag | Silver | 107.8682 | yes | 34 | 107Ag |
| 48 | Cd | Cadmium | 112.411 | yes | 35 | 114Cd |
| 49 | In | Indium | 114.818 | yes | 37 | 115In |
| 50 | Sn | Tin | 118.71 | yes | 38 | 120Sn |
| 51 | Sb | Antimony | 121.76 | yes | 37 | 121Sb |
| 52 | Te | Tellurium | 127.6 | yes | 37 | 130Te |
| 53 | I | Iodine | 126.90447 | yes | 37 | 127I |
| 54 | Xe | Xenon | 131.293 | yes | 38 | 132Xe |
| 55 | Cs | Cesium | 132.90545 | yes | 40 | 133Cs |
| 56 | Ba | Barium | 137.327 | yes | 40 | 138Ba |
| 57 | La | Lathanum | 138.9055 | yes | 39 | 139La |
| 58 | Ce | Cerium | 140.116 | yes | 39 | 140Ce |
| 59 | Pr | Praseodymium | 140.907648 | yes | 39 | 141Pr |
| 60 | Nd | Neodymium | 144.24 | yes | 36 | 142Nd |
| 61 | Pm | Prometium | 145.0 | no | 36 | - |
| 62 | Sm | Samarium | 150.36 | yes | 36 | 152Sm |
| 63 | Eu | Europium | 151.964 | yes | 36 | 153Eu |
| 64 | Gd | Gadolinium | 157.25 | yes | 34 | 158Gd |
| 65 | Tb | Terbium | 158.92534 | yes | 34 | 159Tb |
| 66 | Dy | Dysprosium | 162.5 | yes | 34 | 164Dy |
| 67 | Ho | Holmium | 164.93032 | yes | 34 | 165Ho |
| 68 | Er | Erbium | 167.259 | yes | 34 | 166Er |
| 69 | Tm | Thulium | 168.93421 | yes | 34 | 169Tm |
| 70 | Yb | Ytterbium | 173.04 | yes | 34 | 174Yb |
| 71 | Lu | Lutetium | 174.967 | yes | 35 | 175Lu |
| 72 | Hf | Hafnium | 178.49 | yes | 33 | 180Hf |
| 73 | Ta | Tantalum | 180.9479 | yes | 33 | 181Ta |
| 74 | W | Tungsten | 178.49 | yes | 33 | 184W |
| 75 | Re | Rhenium | 186.207 | yes | 33 | 187Re |
| 76 | Os | Osmium | 190.23 | yes | 35 | 192Os |
| 77 | Ir | Iridium | 192.217 | yes | 35 | 193Ir |
| 78 | Pt | Platinum | 195.078 | yes | 35 | 195Pt |
| 79 | Au | Gold | 196.966552 | yes | 35 | 197Au |
| 80 | Hg | Mercury | 200.59 | yes | 34 | 202Hg |
| 81 | Tl | Thallium | 204.3833 | yes | 34 | 205Tl |
| 82 | Pb | Lead | 207.2 | yes | 34 | 208Pb |
| 83 | Bi | Bismuth | 208.98038 | yes | 32 | 209Bi |
| 84 | Po | Polonium | 209.0 | no | 29 | - |
| 85 | At | Astatine | 210.0 | no | 31 | - |
| 86 | Rn | Radon | 222.0 | no | 33 | - |
| 87 | Fr | Francium | 223.0 | no | 33 | - |
| 88 | Ra | Radium | 226.0 | no | 32 | - |
| 89 | Ac | Actinium | 227.0 | no | 30 | 227Ac |
| 90 | Th | Thorium | 232.0381 | no | 29 | 227Th |
| 91 | Pa | Protactinium | 231.03588 | no | 28 | - |
| 92 | U | Uranium | 238.02891 | no | 25 | 238U |
| 93 | Np | Neptunium | 237.0 | no | 20 | - |
| 94 | Pu | Plutonium | 237.0 | no | 20 | - |
| 95 | Am | Americium | 243.0 | no | 19 | - |
| 96 | Cm | Curium | 247.0 | no | 20 | - |
| 97 | Bk | Berkelium | 247.0 | no | 20 | - |
| 98 | Cf | Californium | 251.0 | no | 20 | - |
| 99 | Es | Einsteinium | 252.0 | no | 18 | - |
| 100 | Fm | Fermium | 257.0 | no | 18 | - |
| 101 | Md | Mendelevium | 258.0 | no | 16 | - |
| 102 | No | Nobelium | 259.0 | no | 14 | - |
| 103 | Lr | Lawrencium | 262.0 | no | 13 | - |
| 104 | Rf | Rutherfordium | 261.0 | no | 12 | - |
| 105 | Db | Dubnium | 262.0 | no | 11 | - |
| 106 | Sg | Seaborgium | 266.0 | no | 9 | - |
| 107 | Bh | Bohrium | 264.0 | no | 8 | - |
| 108 | Hs | Hassium | 277.0 | no | 8 | - |
| 109 | Mt | Meitnerium | 268.0 | no | 7 | - |
| 110 | Ds | Darmstadtium | 281.0 | no | 8 | - |