Hierarchy overview for CHEMICAL_ELEMENTS

Level = -4 LIVING_DATA_DATABASE
Level = -3 UNIVERSE
Level = -2 SUBSTACE
Level = -1 PARTICLES
  1. CHEMICAL_ELEMENTS
    1. Non-Metal_CHEMICAL_ELEMENTS
      1. Hydrogen   -->
      2. Carbon   -->
      3. Nitrogen   -->
      4. Oxygen   -->
      5. Silicon   -->
      6. Phosphorous   -->
      7. Sulfur   -->
      8. Arsenic   -->
      9. Selenium   -->
      10. Tellurium   -->
    2. Noble_Gas_CHEMICAL_ELEMENTS
      1. Helium   -->
      2. Neon   -->
      3. Argon   -->
      4. Krypton   -->
      5. Xenon   -->
      6. Radon   -->
    3. Alkali_Metal_CHEMICAL_ELEMENTS
      1. Lithium   -->
      2. Sodium   -->
      3. Potassium   -->
      4. Rubidium   -->
      5. Cesium   -->
      6. Francium   -->
    4. Alkali_Earth_CHEMICAL_ELEMENTS
      1. Beryllium   -->
      2. Magnesium   -->
      3. Calcium   -->
      4. Strontium   -->
      5. Barium   -->
      6. Radium   -->
    5. Halogen_CHEMICAL_ELEMENTS
      1. Fluorine   -->
      2. Chlorine   -->
      3. Bromine   -->
      4. Iodine   -->
      5. Astatine   -->
    6. Metal_CHEMICAL_ELEMENTS
      1. Aluminum   -->
      2. Gallium   -->
      3. Germanium   -->
      4. Indium   -->
      5. Tin   -->
      6. Antimony   -->
      7. Thallium   -->
      8. Bismuth   -->
      9. Polonium   -->
    7. Transition_Metal_CHEMICAL_ELEMENTS
      1. Scandium   -->
      2. Titanium   -->
      3. Vanadium   -->
      4. Chromium   -->
      5. Manganese   -->
      6. Iron   -->
      7. Cobalt   -->
      8. Copper   -->
      9. Zinc   -->
      10. Yttrium   -->
      11. Zirconium   -->
      12. Niobium   -->
      13. Molybdenum   -->
      14. Technetium   -->
      15. Ruthenium   -->
      16. Rhodium   -->
      17. Palladium   -->
      18. Silver   -->
      19. Cadmium   -->
      20. Lanthanum   -->
      21. Hafnium   -->
      22. Tantalum   -->
      23. Tungsten   -->
      24. Rhenium   -->
      25. Osmium   -->
      26. Iridium   -->
      27. Platinum   -->
      28. Gold       def   -->
      29. Mercury       def   -->
      30. Actinium   -->
      31. Unnilquadium   -->
      32. Unnilpentium   -->
      33. Unnilhexium   -->
      34. Unnilseptium   -->
      35. Unniloctium   -->
      36. Unnilennium   -->
      37. Ununnilium
    8. Rare_Earth_CHEMICAL_ELEMENTS
      1. Cerium   -->
      2. Praseodymium   -->
      3. Neodymium   -->
      4. Promethium   -->
      5. Samarium   -->
      6. Europium   -->
      7. Gadolinium   -->
      8. Terbium   -->
      9. Dysprosium   -->
      10. Holmium   -->
      11. Erbium   -->
      12. Thulium   -->
      13. Ytterbium   -->
      14. Lutetium   -->
      15. Thorium   -->
      16. Protactinium   -->
      17. Uranium   -->
      18. Neptunium   -->
      19. Plutonium   -->
      20. Americium   -->
      21. Curium   -->
      22. Berkelium   -->
      23. Californium   -->
      24. Einsteinium   -->
      25. Fermium   -->
      26. Mendelevium   -->
      27. Nobelium   -->
      28. Lawrencium   -->