local elements = { { atomicNumber = 1, symbol = "H", element = "Hydrogen", group = 1, period = 1, weight = 1.008, density = 0.00008988, meltingPoint = 14.01, boilingPoint = 20.28, heatCapacity = 14.304, electronegativity = 2.2 }, { atomicNumber = 2, symbol = "He", element = "Helium", group = 18, period = 1, weight = 4.002602, density = 0.0001785, meltingPoint = 0.956, boilingPoint = 4.22, heatCapacity = 5.193, electronegativity = nil }, { atomicNumber = 3, symbol = "Li", element = "Lithium", group = 1, period = 2, weight = 6.94, density = 0.534, meltingPoint = 453.69, boilingPoint = 1560, heatCapacity = 3.582, electronegativity = 0.98 }, { atomicNumber = 4, symbol = "Be", element = "Beryllium", group = 2, period = 2, weight = 9.012182, density = 1.85, meltingPoint = 1560, boilingPoint = 2742, heatCapacity = 1.825, electronegativity = 1.57 }, { atomicNumber = 5, symbol = "B", element = "Boron", group = 13, period = 2, weight = 10.81, density = 2.34, meltingPoint = 2349, boilingPoint = 4200, heatCapacity = 1.026, electronegativity = 2.04 }, { atomicNumber = 6, symbol = "C", element = "Carbon", group = 14, period = 2, weight = 12.011, density = 2.267, meltingPoint = 3800, boilingPoint = 4300, heatCapacity = 0.709, electronegativity = 2.55 }, { atomicNumber = 7, symbol = "N", element = "Nitrogen", group = 15, period = 2, weight = 14.007, density = 0.0012506, meltingPoint = 63.15, boilingPoint = 77.36, heatCapacity = 1.04, electronegativity = 3.04 }, { atomicNumber = 8, symbol = "O", element = "Oxygen", group = 16, period = 2, weight = 15.999, density = 0.001429, meltingPoint = 54.36, boilingPoint = 90.2, heatCapacity = 0.918, electronegativity = 3.44 }, { atomicNumber = 9, symbol = "F", element = "Fluorine", group = 17, period = 2, weight = 18.9984032, density = 0.001696, meltingPoint = 53.53, boilingPoint = 85.03, heatCapacity = 0.824, electronegativity = 3.98 }, { atomicNumber = 10, symbol = "Ne", element = "Neon", group = 18, period = 2, weight = 20.1797, density = 0.0008999, meltingPoint = 24.56, boilingPoint = 27.07, heatCapacity = 1.03, electronegativity = nil }, { atomicNumber = 11, symbol = "Na", element = "Sodium", group = 1, period = 3, weight = 22.98976928, density = 0.971, meltingPoint = 370.87, boilingPoint = 1156, heatCapacity = 1.228, electronegativity = 0.93 }, { atomicNumber = 12, symbol = "Mg", element = "Magnesium", group = 2, period = 3, weight = 24.305, density = 1.738, meltingPoint = 923, boilingPoint = 1363, heatCapacity = 1.023, electronegativity = 1.31 }, { atomicNumber = 13, symbol = "Al", element = "Aluminium", group = 13, period = 3, weight = 26.9815386, density = 2.698, meltingPoint = 933.47, boilingPoint = 2792, heatCapacity = 0.897, electronegativity = 1.61 }, { atomicNumber = 14, symbol = "Si", element = "Silicon", group = 14, period = 3, weight = 28.085, density = 2.3296, meltingPoint = 1687, boilingPoint = 3538, heatCapacity = 0.705, electronegativity = 1.9 }, { atomicNumber = 15, symbol = "P", element = "Phosphorus", group = 15, period = 3, weight = 30.973762, density = 1.82, meltingPoint = 317.3, boilingPoint = 550, heatCapacity = 0.769, electronegativity = 2.19 }, { atomicNumber = 16, symbol = "S", element = "Sulfur", group = 16, period = 3, weight = 32.06, density = 2.067, meltingPoint = 388.36, boilingPoint = 717.87, heatCapacity = 0.71, electronegativity = 2.58 }, { atomicNumber = 17, symbol = "Cl", element = "Chlorine", group = 17, period = 3, weight = 35.45, density = 0.003214, meltingPoint = 171.6, boilingPoint = 239.11, heatCapacity = 0.479, electronegativity = 3.16 }, { atomicNumber = 18, symbol = "Ar", element = "Argon", group = 18, period = 3, weight = 39.948, density = 0.0017837, meltingPoint = 83.8, boilingPoint = 87.3, heatCapacity = 0.52, electronegativity = nil }, { atomicNumber = 19, symbol = "K", element = "Potassium", group = 1, period = 4, weight = 39.0983, density = 0.862, meltingPoint = 336.53, boilingPoint = 1032, heatCapacity = 0.757, electronegativity = 0.82 }, { atomicNumber = 20, symbol = "Ca", element = "Calcium", group = 2, period = 4, weight = 40.078, density = 1.54, meltingPoint = 1115, boilingPoint = 1757, heatCapacity = 0.647, electronegativity = 1 }, { atomicNumber = 21, symbol = "Sc", element = "Scandium", group = 3, period = 4, weight = 44.955912, density = 2.989, meltingPoint = 1814, boilingPoint = 3109, heatCapacity = 0.568, electronegativity = 1.36 }, { atomicNumber = 22, symbol = "Ti", element = "Titanium", group = 4, period = 4, weight = 47.867, density = 4.54, meltingPoint = 1941, boilingPoint = 3560, heatCapacity = 0.523, electronegativity = 1.54 }, { atomicNumber = 23, symbol = "V", element = "Vanadium", group = 5, period = 4, weight = 50.9415, density = 6.11, meltingPoint = 2183, boilingPoint = 3680, heatCapacity = 0.489, electronegativity = 1.63 }, { atomicNumber = 24, symbol = "Cr", element = "Chromium", group = 6, period = 4, weight = 51.9961, density = 7.15, meltingPoint = 2180, boilingPoint = 2944, heatCapacity = 0.449, electronegativity = 1.66 }, { atomicNumber = 25, symbol = "Mn", element = "Manganese", group = 7, period = 4, weight = 54.938045, density = 7.44, meltingPoint = 1519, boilingPoint = 2334, heatCapacity = 0.479, electronegativity = 1.55 }, { atomicNumber = 26, symbol = "Fe", element = "Iron", group = 8, period = 4, weight = 55.845, density = 7.874, meltingPoint = 1811, boilingPoint = 3134, heatCapacity = 0.449, electronegativity = 1.83 }, { atomicNumber = 27, symbol = "Co", element = "Cobalt", group = 9, period = 4, weight = 58.933195, density = 8.86, meltingPoint = 1768, boilingPoint = 3200, heatCapacity = 0.421, electronegativity = 1.88 }, { atomicNumber = 28, symbol = "Ni", element = "Nickel", group = 10, period = 4, weight = 58.6934, density = 8.912, meltingPoint = 1728, boilingPoint = 3186, heatCapacity = 0.444, electronegativity = 1.91 }, { atomicNumber = 29, symbol = "Cu", element = "Copper", group = 11, period = 4, weight = 63.546, density = 8.96, meltingPoint = 1357.77, boilingPoint = 2835, heatCapacity = 0.385, electronegativity = 1.9 }, { atomicNumber = 30, symbol = "Zn", element = "Zinc", group = 12, period = 4, weight = 65.38, density = 7.134, meltingPoint = 692.88, boilingPoint = 1180, heatCapacity = 0.388, electronegativity = 1.65 }, { atomicNumber = 31, symbol = "Ga", element = "Gallium", group = 13, period = 4, weight = 69.723, density = 5.907, meltingPoint = 302.9146, boilingPoint = 2477, heatCapacity = 0.371, electronegativity = 1.81 }, { atomicNumber = 32, symbol = "Ge", element = "Germanium", group = 14, period = 4, weight = 72.63, density = 5.323, meltingPoint = 1211.4, boilingPoint = 3106, heatCapacity = 0.32, electronegativity = 2.01 }, { atomicNumber = 33, symbol = "As", element = "Arsenic", group = 15, period = 4, weight = 74.9216, density = 5.776, meltingPoint = 1090, boilingPoint = 887, heatCapacity = 0.329, electronegativity = 2.18 }, { atomicNumber = 34, symbol = "Se", element = "Selenium", group = 16, period = 4, weight = 78.96, density = 4.809, meltingPoint = 453, boilingPoint = 958, heatCapacity = 0.321, electronegativity = 2.55 }, { atomicNumber = 35, symbol = "Br", element = "Bromine", group = 17, period = 4, weight = 79.904, density = 3.122, meltingPoint = 265.8, boilingPoint = 332, heatCapacity = 0.474, electronegativity = 2.96 }, { atomicNumber = 36, symbol = "Kr", element = "Krypton", group = 18, period = 4, weight = 83.798, density = 0.003733, meltingPoint = 115.79, boilingPoint = 119.93, heatCapacity = 0.248, electronegativity = 3 }, { atomicNumber = 37, symbol = "Rb", element = "Rubidium", group = 1, period = 5, weight = 85.4678, density = 1.532, meltingPoint = 312.46, boilingPoint = 961, heatCapacity = 0.363, electronegativity = 0.82 }, { atomicNumber = 38, symbol = "Sr", element = "Strontium", group = 2, period = 5, weight = 87.62, density = 2.64, meltingPoint = 1050, boilingPoint = 1655, heatCapacity = 0.301, electronegativity = 0.95 }, { atomicNumber = 39, symbol = "Y", element = "Yttrium", group = 3, period = 5, weight = 88.90585, density = 4.469, meltingPoint = 1799, boilingPoint = 3609, heatCapacity = 0.298, electronegativity = 1.22 }, { atomicNumber = 40, symbol = "Zr", element = "Zirconium", group = 4, period = 5, weight = 91.224, density = 6.506, meltingPoint = 2128, boilingPoint = 4682, heatCapacity = 0.278, electronegativity = 1.33 }, { atomicNumber = 41, symbol = "Nb", element = "Niobium", group = 5, period = 5, weight = 92.90638, density = 8.57, meltingPoint = 2750, boilingPoint = 5017, heatCapacity = 0.265, electronegativity = 1.6 }, { atomicNumber = 42, symbol = "Mo", element = "Molybdenum", group = 6, period = 5, weight = 95.96, density = 10.22, meltingPoint = 2896, boilingPoint = 4912, heatCapacity = 0.251, electronegativity = 2.16 }, { atomicNumber = 43, symbol = "Tc", element = "Technetium", group = 7, period = 5, weight = 98, density = 11.5, meltingPoint = 2430, boilingPoint = 4538, heatCapacity = nil, electronegativity = 1.9 }, { atomicNumber = 44, symbol = "Ru", element = "Ruthenium", group = 8, period = 5, weight = 101.07, density = 12.37, meltingPoint = 2607, boilingPoint = 4423, heatCapacity = 0.238, electronegativity = 2.2 }, { atomicNumber = 45, symbol = "Rh", element = "Rhodium", group = 9, period = 5, weight = 102.9055, density = 12.41, meltingPoint = 2237, boilingPoint = 3968, heatCapacity = 0.243, electronegativity = 2.28 }, { atomicNumber = 46, symbol = "Pd", element = "Palladium", group = 10, period = 5, weight = 106.42, density = 12.02, meltingPoint = 1828.05, boilingPoint = 3236, heatCapacity = 0.244, electronegativity = 2.2 }, { atomicNumber = 47, symbol = "Ag", element = "Silver", group = 11, period = 5, weight = 107.8682, density = 10.501, meltingPoint = 1234.93, boilingPoint = 2435, heatCapacity = 0.235, electronegativity = 1.93 }, { atomicNumber = 48, symbol = "Cd", element = "Cadmium", group = 12, period = 5, weight = 112.411, density = 8.69, meltingPoint = 594.22, boilingPoint = 1040, heatCapacity = 0.232, electronegativity = 1.69 }, { atomicNumber = 49, symbol = "In", element = "Indium", group = 13, period = 5, weight = 114.818, density = 7.31, meltingPoint = 429.75, boilingPoint = 2345, heatCapacity = 0.233, electronegativity = 1.78 }, { atomicNumber = 50, symbol = "Sn", element = "Tin", group = 14, period = 5, weight = 118.71, density = 7.287, meltingPoint = 505.08, boilingPoint = 2875, heatCapacity = 0.228, electronegativity = 1.96 }, { atomicNumber = 51, symbol = "Sb", element = "Antimony", group = 15, period = 5, weight = 121.76, density = 6.685, meltingPoint = 903.78, boilingPoint = 1860, heatCapacity = 0.207, electronegativity = 2.05 }, { atomicNumber = 52, symbol = "Te", element = "Tellurium", group = 16, period = 5, weight = 127.6, density = 6.232, meltingPoint = 722.66, boilingPoint = 1261, heatCapacity = 0.202, electronegativity = 2.1 }, { atomicNumber = 53, symbol = "I", element = "Iodine", group = 17, period = 5, weight = 126.90447, density = 4.93, meltingPoint = 386.85, boilingPoint = 457.4, heatCapacity = 0.214, electronegativity = 2.66 }, { atomicNumber = 54, symbol = "Xe", element = "Xenon", group = 18, period = 5, weight = 131.293, density = 0.005887, meltingPoint = 161.4, boilingPoint = 165.03, heatCapacity = 0.158, electronegativity = 2.6 }, { atomicNumber = 55, symbol = "Cs", element = "Caesium", group = 1, period = 6, weight = 132.9054519, density = 1.873, meltingPoint = 301.59, boilingPoint = 944, heatCapacity = 0.242, electronegativity = 0.79 }, { atomicNumber = 56, symbol = "Ba", element = "Barium", group = 2, period = 6, weight = 137.327, density = 3.594, meltingPoint = 1000, boilingPoint = 2170, heatCapacity = 0.204, electronegativity = 0.89 }, { atomicNumber = 57, symbol = "La", element = "Lanthanum", group = nil, period = 6, weight = 138.90547, density = 6.145, meltingPoint = 1193, boilingPoint = 3737, heatCapacity = 0.195, electronegativity = 1.1 }, { atomicNumber = 58, symbol = "Ce", element = "Cerium", group = nil, period = 6, weight = 140.116, density = 6.77, meltingPoint = 1068, boilingPoint = 3716, heatCapacity = 0.192, electronegativity = 1.12 }, { atomicNumber = 59, symbol = "Pr", element = "Praseodymium", group = nil, period = 6, weight = 140.90765, density = 6.773, meltingPoint = 1208, boilingPoint = 3793, heatCapacity = 0.193, electronegativity = 1.13 }, { atomicNumber = 60, symbol = "Nd", element = "Neodymium", group = nil, period = 6, weight = 144.242, density = 7.007, meltingPoint = 1297, boilingPoint = 3347, heatCapacity = 0.19, electronegativity = 1.14 }, { atomicNumber = 61, symbol = "Pm", element = "Promethium", group = nil, period = 6, weight = 145, density = 7.26, meltingPoint = 1315, boilingPoint = 3273, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 62, symbol = "Sm", element = "Samarium", group = nil, period = 6, weight = 150.36, density = 7.52, meltingPoint = 1345, boilingPoint = 2067, heatCapacity = 0.197, electronegativity = 1.17 }, { atomicNumber = 63, symbol = "Eu", element = "Europium", group = nil, period = 6, weight = 151.964, density = 5.243, meltingPoint = 1099, boilingPoint = 1802, heatCapacity = 0.182, electronegativity = 1.2 }, { atomicNumber = 64, symbol = "Gd", element = "Gadolinium", group = nil, period = 6, weight = 157.25, density = 7.895, meltingPoint = 1585, boilingPoint = 3546, heatCapacity = 0.236, electronegativity = 1.2 }, { atomicNumber = 65, symbol = "Tb", element = "Terbium", group = nil, period = 6, weight = 158.92535, density = 8.229, meltingPoint = 1629, boilingPoint = 3503, heatCapacity = 0.182, electronegativity = 1.2 }, { atomicNumber = 66, symbol = "Dy", element = "Dysprosium", group = nil, period = 6, weight = 162.5, density = 8.55, meltingPoint = 1680, boilingPoint = 2840, heatCapacity = 0.17, electronegativity = 1.22 }, { atomicNumber = 67, symbol = "Ho", element = "Holmium", group = nil, period = 6, weight = 164.93032, density = 8.795, meltingPoint = 1734, boilingPoint = 2993, heatCapacity = 0.165, electronegativity = 1.23 }, { atomicNumber = 68, symbol = "Er", element = "Erbium", group = nil, period = 6, weight = 167.259, density = 9.066, meltingPoint = 1802, boilingPoint = 3141, heatCapacity = 0.168, electronegativity = 1.24 }, { atomicNumber = 69, symbol = "Tm", element = "Thulium", group = nil, period = 6, weight = 168.93421, density = 9.321, meltingPoint = 1818, boilingPoint = 2223, heatCapacity = 0.16, electronegativity = 1.25 }, { atomicNumber = 70, symbol = "Yb", element = "Ytterbium", group = nil, period = 6, weight = 173.054, density = 6.965, meltingPoint = 1097, boilingPoint = 1469, heatCapacity = 0.155, electronegativity = 1.1 }, { atomicNumber = 71, symbol = "Lu", element = "Lutetium", group = 3, period = 6, weight = 174.9668, density = 9.84, meltingPoint = 1925, boilingPoint = 3675, heatCapacity = 0.154, electronegativity = 1.27 }, { atomicNumber = 72, symbol = "Hf", element = "Hafnium", group = 4, period = 6, weight = 178.49, density = 13.31, meltingPoint = 2506, boilingPoint = 4876, heatCapacity = 0.144, electronegativity = 1.3 }, { atomicNumber = 73, symbol = "Ta", element = "Tantalum", group = 5, period = 6, weight = 180.94788, density = 16.654, meltingPoint = 3290, boilingPoint = 5731, heatCapacity = 0.14, electronegativity = 1.5 }, { atomicNumber = 74, symbol = "W", element = "Tungsten", group = 6, period = 6, weight = 183.84, density = 19.25, meltingPoint = 3695, boilingPoint = 5828, heatCapacity = 0.132, electronegativity = 2.36 }, { atomicNumber = 75, symbol = "Re", element = "Rhenium", group = 7, period = 6, weight = 186.207, density = 21.02, meltingPoint = 3459, boilingPoint = 5869, heatCapacity = 0.137, electronegativity = 1.9 }, { atomicNumber = 76, symbol = "Os", element = "Osmium", group = 8, period = 6, weight = 190.23, density = 22.61, meltingPoint = 3306, boilingPoint = 5285, heatCapacity = 0.13, electronegativity = 2.2 }, { atomicNumber = 77, symbol = "Ir", element = "Iridium", group = 9, period = 6, weight = 192.217, density = 22.56, meltingPoint = 2719, boilingPoint = 4701, heatCapacity = 0.131, electronegativity = 2.2 }, { atomicNumber = 78, symbol = "Pt", element = "Platinum", group = 10, period = 6, weight = 195.084, density = 21.46, meltingPoint = 2041.4, boilingPoint = 4098, heatCapacity = 0.133, electronegativity = 2.28 }, { atomicNumber = 79, symbol = "Au", element = "Gold", group = 11, period = 6, weight = 196.966569, density = 19.282, meltingPoint = 1337.33, boilingPoint = 3129, heatCapacity = 0.129, electronegativity = 2.54 }, { atomicNumber = 80, symbol = "Hg", element = "Mercury", group = 12, period = 6, weight = 200.59, density = 13.5336, meltingPoint = 234.43, boilingPoint = 629.88, heatCapacity = 0.14, electronegativity = 2 }, { atomicNumber = 81, symbol = "Tl", element = "Thallium", group = 13, period = 6, weight = 204.38, density = 11.85, meltingPoint = 577, boilingPoint = 1746, heatCapacity = 0.129, electronegativity = 1.62 }, { atomicNumber = 82, symbol = "Pb", element = "Lead", group = 14, period = 6, weight = 207.2, density = 11.342, meltingPoint = 600.61, boilingPoint = 2022, heatCapacity = 0.129, electronegativity = 2.33 }, { atomicNumber = 83, symbol = "Bi", element = "Bismuth", group = 15, period = 6, weight = 208.9804, density = 9.807, meltingPoint = 544.7, boilingPoint = 1837, heatCapacity = 0.122, electronegativity = 2.02 }, { atomicNumber = 84, symbol = "Po", element = "Polonium", group = 16, period = 6, weight = 209, density = 9.32, meltingPoint = 527, boilingPoint = 1235, heatCapacity = nil, electronegativity = 2 }, { atomicNumber = 85, symbol = "At", element = "Astatine", group = 17, period = 6, weight = 210, density = 7, meltingPoint = 575, boilingPoint = 610, heatCapacity = nil, electronegativity = 2.2 }, { atomicNumber = 86, symbol = "Rn", element = "Radon", group = 18, period = 6, weight = 222, density = 0.00973, meltingPoint = 202, boilingPoint = 211.3, heatCapacity = 0.094, electronegativity = nil }, { atomicNumber = 87, symbol = "Fr", element = "Francium", group = 1, period = 7, weight = 223, density = 1.87, meltingPoint = 300, boilingPoint = 950, heatCapacity = nil, electronegativity = 0.7 }, { atomicNumber = 88, symbol = "Ra", element = "Radium", group = 2, period = 7, weight = 226, density = 5.5, meltingPoint = 973, boilingPoint = 2010, heatCapacity = nil, electronegativity = 0.9 }, { atomicNumber = 89, symbol = "Ac", element = "Actinium", group = nil, period = 7, weight = 227, density = 10.07, meltingPoint = 1323, boilingPoint = 3471, heatCapacity = 0.12, electronegativity = 1.1 }, { atomicNumber = 90, symbol = "Th", element = "Thorium", group = nil, period = 7, weight = 232.03806, density = 11.72, meltingPoint = 2115, boilingPoint = 5061, heatCapacity = 0.113, electronegativity = 1.3 }, { atomicNumber = 91, symbol = "Pa", element = "Protactinium", group = nil, period = 7, weight = 231.03588, density = 15.37, meltingPoint = 1841, boilingPoint = 4300, heatCapacity = nil, electronegativity = 1.5 }, { atomicNumber = 92, symbol = "U", element = "Uranium", group = nil, period = 7, weight = 238.02891, density = 18.95, meltingPoint = 1405.3, boilingPoint = 4404, heatCapacity = 0.116, electronegativity = 1.38 }, { atomicNumber = 93, symbol = "Np", element = "Neptunium", group = nil, period = 7, weight = 237, density = 20.45, meltingPoint = 917, boilingPoint = 4273, heatCapacity = nil, electronegativity = 1.36 }, { atomicNumber = 94, symbol = "Pu", element = "Plutonium", group = nil, period = 7, weight = 244, density = 19.84, meltingPoint = 912.5, boilingPoint = 3501, heatCapacity = nil, electronegativity = 1.28 }, { atomicNumber = 95, symbol = "Am", element = "Americium", group = nil, period = 7, weight = 243, density = 13.69, meltingPoint = 1449, boilingPoint = 2880, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 96, symbol = "Cm", element = "Curium", group = nil, period = 7, weight = 247, density = 13.51, meltingPoint = 1613, boilingPoint = 3383, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 97, symbol = "Bk", element = "Berkelium", group = nil, period = 7, weight = 247, density = 14.79, meltingPoint = 1259, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 98, symbol = "Cf", element = "Californium", group = nil, period = 7, weight = 251, density = 15.1, meltingPoint = 1173, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 99, symbol = "Es", element = "Einsteinium", group = nil, period = 7, weight = 252, density = 13.5, meltingPoint = 1133, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 100, symbol = "Fm", element = "Fermium", group = nil, period = 7, weight = 257, density = 0, meltingPoint = 1800, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 101, symbol = "Md", element = "Mendelevium", group = nil, period = 7, weight = 258, density = 0, meltingPoint = 1100, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 102, symbol = "No", element = "Nobelium", group = nil, period = 7, weight = 259, density = 0, meltingPoint = 1100, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 103, symbol = "Lr", element = "Lawrencium", group = 3, period = 7, weight = 262, density = 0, meltingPoint = 1900, boilingPoint = nil, heatCapacity = nil, electronegativity = 1.3 }, { atomicNumber = 104, symbol = "Rf", element = "Rutherfordium", group = 4, period = 7, weight = 267, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 105, symbol = "Db", element = "Dubnium", group = 5, period = 7, weight = 268, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 106, symbol = "Sg", element = "Seaborgium", group = 6, period = 7, weight = 269, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 107, symbol = "Bh", element = "Bohrium", group = 7, period = 7, weight = 270, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 108, symbol = "Hs", element = "Hassium", group = 8, period = 7, weight = 269, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 109, symbol = "Mt", element = "Meitnerium", group = 9, period = 7, weight = 278, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 110, symbol = "Ds", element = "Darmstadtium", group = 10, period = 7, weight = 281, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 111, symbol = "Rg", element = "Roentgenium", group = 11, period = 7, weight = 281, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 112, symbol = "Cn", element = "Copernicium", group = 12, period = 7, weight = 285, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 113, symbol = "Uut", element = "Ununtrium", group = 13, period = 7, weight = 286, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 114, symbol = "Fl", element = "Flerovium", group = 14, period = 7, weight = 289, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 115, symbol = "Uup", element = "Ununpentium", group = 15, period = 7, weight = 288, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 116, symbol = "Lv", element = "Livermorium", group = 16, period = 7, weight = 293, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 117, symbol = "Uus", element = "Ununseptium", group = 17, period = 7, weight = 294, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil }, { atomicNumber = 118, symbol = "Uuo", element = "Ununoctium", group = 18, period = 7, weight = 294, density = 0, meltingPoint = nil, boilingPoint = nil, heatCapacity = nil, electronegativity = nil } } return elements