[
  {"number": 1, "symbol": "H", "name": "Hydrogen", "mass": 1.008, "group": 1, "period": 1, "category": "Nonmetal"},
  {"number": 2, "symbol": "He", "name": "Helium", "mass": 4.0026, "group": 18, "period": 1, "category": "Noble gas"},
  {"number": 3, "symbol": "Li", "name": "Lithium", "mass": 6.94, "group": 1, "period": 2, "category": "Alkali metal"},
  {"number": 4, "symbol": "Be", "name": "Beryllium", "mass": 9.0122, "group": 2, "period": 2, "category": "Alkaline earth metal"},
  {"number": 5, "symbol": "B", "name": "Boron", "mass": 10.81, "group": 13, "period": 2, "category": "Metalloid"},
  {"number": 6, "symbol": "C", "name": "Carbon", "mass": 12.011, "group": 14, "period": 2, "category": "Nonmetal"},
  {"number": 7, "symbol": "N", "name": "Nitrogen", "mass": 14.007, "group": 15, "period": 2, "category": "Nonmetal"},
  {"number": 8, "symbol": "O", "name": "Oxygen", "mass": 15.999, "group": 16, "period": 2, "category": "Nonmetal"},
  {"number": 9, "symbol": "F", "name": "Fluorine", "mass": 18.998, "group": 17, "period": 2, "category": "Halogen"},
  {"number": 10, "symbol": "Ne", "name": "Neon", "mass": 20.18, "group": 18, "period": 2, "category": "Noble gas"},
  {"number": 11, "symbol": "Na", "name": "Sodium", "mass": 22.99, "group": 1, "period": 3, "category": "Alkali metal"},
  {"number": 12, "symbol": "Mg", "name": "Magnesium", "mass": 24.305, "group": 2, "period": 3, "category": "Alkaline earth metal"},
  {"number": 13, "symbol": "Al", "name": "Aluminium", "mass": 26.982, "group": 13, "period": 3, "category": "Post-transition metal"},
  {"number": 14, "symbol": "Si", "name": "Silicon", "mass": 28.085, "group": 14, "period": 3, "category": "Metalloid"},
  {"number": 15, "symbol": "P", "name": "Phosphorus", "mass": 30.974, "group": 15, "period": 3, "category": "Nonmetal"},
  {"number": 16, "symbol": "S", "name": "Sulfur", "mass": 32.06, "group": 16, "period": 3, "category": "Nonmetal"},
  {"number": 17, "symbol": "Cl", "name": "Chlorine", "mass": 35.45, "group": 17, "period": 3, "category": "Halogen"},
  {"number": 18, "symbol": "Ar", "name": "Argon", "mass": 39.948, "group": 18, "period": 3, "category": "Noble gas"},
  {"number": 19, "symbol": "K", "name": "Potassium", "mass": 39.098, "group": 1, "period": 4, "category": "Alkali metal"},
  {"number": 20, "symbol": "Ca", "name": "Calcium", "mass": 40.078, "group": 2, "period": 4, "category": "Alkaline earth metal"},
  {"number": 21, "symbol": "Sc", "name": "Scandium", "mass": 44.956, "group": 3, "period": 4, "category": "Transition metal"},
  {"number": 22, "symbol": "Ti", "name": "Titanium", "mass": 47.867, "group": 4, "period": 4, "category": "Transition metal"},
  {"number": 23, "symbol": "V", "name": "Vanadium", "mass": 50.942, "group": 5, "period": 4, "category": "Transition metal"},
  {"number": 24, "symbol": "Cr", "name": "Chromium", "mass": 51.996, "group": 6, "period": 4, "category": "Transition metal"},
  {"number": 25, "symbol": "Mn", "name": "Manganese", "mass": 54.938, "group": 7, "period": 4, "category": "Transition metal"},
  {"number": 26, "symbol": "Fe", "name": "Iron", "mass": 55.845, "group": 8, "period": 4, "category": "Transition metal"},
  {"number": 27, "symbol": "Co", "name": "Cobalt", "mass": 58.933, "group": 9, "period": 4, "category": "Transition metal"},
  {"number": 28, "symbol": "Ni", "name": "Nickel", "mass": 58.693, "group": 10, "period": 4, "category": "Transition metal"},
  {"number": 29, "symbol": "Cu", "name": "Copper", "mass": 63.546, "group": 11, "period": 4, "category": "Transition metal"},
  {"number": 30, "symbol": "Zn", "name": "Zinc", "mass": 65.38, "group": 12, "period": 4, "category": "Transition metal"}
]