{ "H": { "fullName": "Hydrogen", "mw": 1.00794 }, "He": { "fullName": "Helium", "mw": 4.0026 }, "Li": { "fullName": "Lithium", "mw": 6.941 }, "Be": { "fullName": "Beryllium", "mw": 9.01218 }, "B": { "fullName": "Boron", "mw": 10.811 }, "C": { "fullName": "Carbon", "mw": 12.011 }, "N": { "fullName": "Nitrogen", "mw": 14.0067 }, "O": { "fullName": "Oxygen", "mw": 15.9994 }, "F": { "fullName": "Fluorine", "mw": 18.9984 }, "Ne": { "fullName": "Neon", "mw": 20.1797 }, "Na": { "fullName": "Sodium", "mw": 22.98977 }, "Mg": { "fullName": "Magnesium", "mw": 24.305 }, "Al": { "fullName": "Aluminium", "mw": 26.98154 }, "Si": { "fullName": "Silicon", "mw": 28.0855 }, "P": { "fullName": "Phosphorous", "mw": 30.97376 }, "S": { "fullName": "Sulphur", "mw": 32.066 }, "Cl": { "fullName": "Chlorine", "mw": 35.4527 }, "Ar": { "fullName": "Argon", "mw": 39.948 }, "K": { "fullName": "Potassium", "mw": 39.0983 }, "Ca": { "fullName": "Calcium", "mw": 40.078 }, "Sc": { "fullName": "Scandium", "mw": 44.9559 }, "Ti": { "fullName": "Titanium", "mw": 47.88 }, "V": { "fullName": "Vanadium", "mw": 50.9415 }, "Cr": { "fullName": "Chromium", "mw": 51.996 }, "Mn": { "fullName": "Manganese", "mw": 54.938 }, "Fe": { "fullName": "Iron", "mw": 55.847 }, "Co": { "fullName": "Cobalt", "mw": 58.9332 }, "Ni": { "fullName": "Nickel", "mw": 58.6934 }, "Cu": { "fullName": "Copper", "mw": 63.546 }, "Zn": { "fullName": "Zinc", "mw": 65.39 }, "Ga": { "fullName": "Gallium", "mw": 69.723 }, "Ge": { "fullName": "Germanium", "mw": 72.61 }, "As": { "fullName": "Astatine", "mw": 74.9216 }, "Se": { "fullName": "Selenium", "mw": 78.96 }, "Br": { "fullName": "Bromine", "mw": 79.904 }, "Kr": { "fullName": "Krypton", "mw": 83.8 }, "Rb": { "fullName": "Rubidium", "mw": 85.4678 }, "Sr": { "fullName": "Strontium", "mw": 87.62 }, "Y": { "fullName": "Yttrium", "mw": 88.9059 }, "Zr": { "fullName": "Zirconium", "mw": 91.224 }, "Nb": { "fullName": "Niobium", "mw": 92.9064 }, "Mo": { "fullName": "Molybdenum", "mw": 95.94 }, "Tc": { "fullName": "Technetium", "mw": 98 }, "Ru": { "fullName": "Ruthenium", "mw": 101.07 }, "Rh": { "fullName": "Rhodium", "mw": 102.9055 }, "Pd": { "fullName": "Palladium", "mw": 106.42 }, "Ag": { "fullName": "Silver", "mw": 107.868 }, "Cd": { "fullName": "Cadmium", "mw": 112.41 }, "In": { "fullName": "Indium", "mw": 114.82 }, "Sn": { "fullName": "Tin", "mw": 118.71 }, "Sb": { "fullName": "Antimony", "mw": 121.757 }, "Te": { "fullName": "Tellurium", "mw": 127.6 }, "I": { "fullName": "Iodine", "mw": 126.9045 }, "Xe": { "fullName": "Xenon", "mw": 131.29 }, "Cs": { "fullName": "Caesium", "mw": 132.9054 }, "Ba": { "fullName": "Barium", "mw": 137.33 }, "La": { "fullName": "Lanthanum", "mw": 138.9055 }, "Hf": { "fullName": "Hafnium", "mw": 178.49 }, "Ta": { "fullName": "Tantalum", "mw": 180.9479 }, "W": { "fullName": "Tungsten", "mw": 183.85 }, "Re": { "fullName": "Rhenium", "mw": 186.207 }, "Os": { "fullName": "Osmium", "mw": 190.2 }, "Ir": { "fullName": "Iridium", "mw": 192.22 }, "Pt": { "fullName": "Platinum", "mw": 195.08 }, "Au": { "fullName": "Gold", "mw": 196.9665 }, "Hg": { "fullName": "Mercury", "mw": 200.59 }, "Tl": { "fullName": "Thallium", "mw": 204.383 }, "Pb": { "fullName": "Lead", "mw": 207.2 }, "Bi": { "fullName": "Bismuth", "mw": 208.9804 }, "Po": { "fullName": "Polonium", "mw": 209 }, "At": { "fullName": "Astatine", "mw": 210 }, "Rn": { "fullName": "Radon", "mw": 222 }, "Fr": { "fullName": "Francium", "mw": 223 }, "Ra": { "fullName": "Radium", "mw": 226.0254 }, "Ac": { "fullName": "Actinium", "mw": 227 }, "Rf": { "fullName": "Rutherfordium", "mw": 261 }, "Db": { "fullName": "Dubnium", "mw": 262 }, "Sg": { "fullName": "Seaborgium", "mw": 263 }, "Bh": { "fullName": "Bohrium", "mw": 262 }, "Hs": { "fullName": "Hassium", "mw": 265 }, "Mt": { "fullName": "Meitnerium", "mw": 266 }, "Uun": { "fullName": "Ununnilium", "mw": 269 }, "Uuu": { "fullName": "Unununium", "mw": 272 }, "Uub": { "fullName": "Ununbium", "mw": 277 }, "Ce": { "fullName": "Cerium", "mw": 140.12 }, "Pr": { "fullName": "Propyl", "mw": 43.089 }, "Nd": { "fullName": "Neodymium", "mw": 144.24 }, "Pm": { "fullName": "Promethium", "mw": 145 }, "Sm": { "fullName": "Samarium", "mw": 150.36 }, "Eu": { "fullName": "Europium", "mw": 151.965 }, "Gd": { "fullName": "Gadolinium", "mw": 157.25 }, "Tb": { "fullName": "Terbium", "mw": 158.9253 }, "Dy": { "fullName": "Dysprosium", "mw": 162.5 }, "Ho": { "fullName": "Holmium", "mw": 164.9303 }, "Er": { "fullName": "Erbium", "mw": 167.26 }, "Tm": { "fullName": "Thulium", "mw": 168.9342 }, "Yb": { "fullName": "Ytterbium", "mw": 173.04 }, "Lu": { "fullName": "Lutetium", "mw": 174.967 }, "Th": { "fullName": "Thorium", "mw": 232.0381 }, "Pa": { "fullName": "Protactinium", "mw": 231.0359 }, "U": { "fullName": "Uranium", "mw": 238.029 }, "Np": { "fullName": "Neptunium", "mw": 237.0482 }, "Pu": { "fullName": "Plutonium", "mw": 244 }, "Am": { "fullName": "Americium", "mw": 243 }, "Cm": { "fullName": "Curium", "mw": 247 }, "Bk": { "fullName": "Berkelium", "mw": 247 }, "Cf": { "fullName": "Californium", "mw": 251 }, "Es": { "fullName": "Einsteinium", "mw": 252 }, "Fm": { "fullName": "Fermium", "mw": 257 }, "Md": { "fullName": "Mendelevium", "mw": 258 }, "No": { "fullName": "Nobelium", "mw": 259 }, "Lr": { "fullName": "Lawrencium", "mw": 262 }, "Me": { "fullName": "Meiternium", "mw": 15.035 }, "Et": { "fullName": "Ethyl", "mw": 29.062 }, "Bu": { "fullName": "Butyl", "mw": 57.115 }, "Ts": { "fullName": "Tosyl", "mw": 155.197 }, "Aq": { "fullName": "Hydrate", "mw": 18.015 }, "Ph": { "fullName": "Phenyl", "mw": 77.106 } }