H = dict(name = "Hydrogen", mass = 1.0079, Z = 1, symbol = 'H')
He = dict(name = "Helium", mass = 4.0026, Z = 2, symbol = 'He')
Li = dict(name = "Lithium", mass = 6.941, Z = 3, symbol = 'Li')
Be = dict(name = "Beryllium", mass = 9.0122, Z = 4, symbol = 'Be')
B = dict(name = "Boron", mass = 10.811, Z = 5, symbol = 'B')
C = dict(name = "Carbon", mass = 12.011, Z = 6, symbol = 'C')
N = dict(name = "Nitrogen", mass = 14.007, Z = 7, symbol = 'N')
O = dict(name = "Oxygen", mass = 15.999, Z = 8, symbol = 'O')
F = dict(name = "Fluorine", mass = 18.998, Z = 9, symbol = 'F')
Ne = dict(name = "Neon", mass = 20.180, Z = 10, symbol = 'Ne')
Na = dict(name = "Sodium", mass = 22.990, Z = 11, symbol = 'Na')
Mg = dict(name = "Magnesium", mass = 24.305, Z = 12, symbol = 'Mg')
Al = dict(name = "Aluminium", mass = 26.982, Z = 13, symbol = 'Al')
Si = dict(name = "Silicon", mass = 28.086, Z = 14, symbol = 'Si')
P = dict(name = "Phosphorus", mass = 30.974, Z = 15, symbol = 'P')
S = dict(name = "Sulfur", mass = 32.066, Z = 16, symbol = 'S')
Cl = dict(name = "Chlorine", mass = 35.453, Z = 17, symbol = 'Cl')
Ar = dict(name = "Argon", mass = 39.948, Z = 18, symbol = 'Ar')
K = dict(name = "Potassium", mass = 39.098, Z = 19, symbol = 'K')
Ca = dict(name = "Calcium", mass = 40.078, Z = 20, symbol = 'Ca')
Sc = dict(name = "Scandium", mass = 44.956, Z = 21, symbol = 'Sc')
Ti = dict(name = "Titanium", mass = 47.867, Z = 22, symbol = 'Ti')
V = dict(name = "Vanadium", mass = 50.942, Z = 23, symbol = 'V')
Cr = dict(name = "Chromium", mass = 51.996, Z = 24, symbol = 'Cr')
Mn = dict(name = "Manganese", mass = 54.938, Z = 25, symbol = 'Mn')
Fe = dict(name = "Iron", mass = 55.845, Z = 26, symbol = 'Fe')
Co = dict(name = "Cobalt", mass = 58.993, Z = 27, symbol = 'Co')
Ni = dict(name = "Nickel", mass = 58.693, Z = 28, symbol = 'Ni')
Cu = dict(name = "Copper", mass = 63.546, Z = 29, symbol = 'Cu')
Zn = dict(name = "Zinc", mass = 65.39, Z = 30, symbol = 'Zn')
Ga = dict(name = "Gallium", mass = 69.723, Z = 31, symbol = 'Ga')
Ge = dict(name = "Germanium", mass = 72.61, Z = 32, symbol = 'Ge')
As = dict(name = "Arsenic", mass = 74.922, Z = 33, symbol = 'As')
Se = dict(name = "Selenium", mass = 78.96, Z = 34, symbol = 'Se')
Br = dict(name = "Bromine", mass = 79.904, Z = 35, symbol = 'Br')
Kr = dict(name = "Krypton", mass = 83.80, Z = 36, symbol = 'Kr')
Rb = dict(name = "Rubidium", mass = 85.468, Z = 37, symbol = 'Rb')
Sr = dict(name = "Strontium", mass = 87.62, Z = 38, symbol = 'Sr')
Y = dict(name = "Yttrium", mass = 88.906, Z = 39, symbol = 'Y')
Zr = dict(name = "Zirconium", mass = 91.224, Z = 40, symbol = 'Zr')
Nb = dict(name = "Niobium", mass = 92.906, Z = 41, symbol = 'Nb')
Mo = dict(name = "Molibdenium", mass = 95.94, Z = 42, symbol = 'Mo')
Tc = dict(name = "Technetium", mass = 98.906, Z = 43, symbol = 'Tc')
Ru = dict(name = "Ruthenium", mass = 101.07, Z = 44, symbol = 'Ru')
Rh = dict(name = "Rhodium", mass = 102.91, Z = 45, symbol = 'Rh')
Pd = dict(name = "Palladium", mass = 106.42, Z = 46, symbol = 'Pd')
Ag = dict(name = "Silver", mass = 107.87, Z = 47, symbol = 'Ag')
Cd = dict(name = "Cadmium", mass = 112.41, Z = 48, symbol = 'Cd')
In = dict(name = "Indium", mass = 114.82, Z = 49, symbol = 'In')
Sn = dict(name = "Tin", mass = 118.71, Z = 50, symbol = 'Sn')
Sb = dict(name = "Antimony", mass = 121.76, Z = 51, symbol = 'Sb')
Te = dict(name = "Tellurium", mass = 127.60, Z = 52, symbol = 'Te')
I = dict(name = "Iodine", mass = 126.90, Z = 53, symbol = 'I')
Xe = dict(name = "Xenon", mass = 131.29, Z = 54, symbol = 'Xe')
Cs = dict(name = "Caesium", mass = 132.91, Z = 55, symbol = 'Cs')
Ba = dict(name = "Barium", mass = 137.33, Z = 56, symbol = 'Ba')