| (subclass ElementalSubstance PureSubstance) | Merge.kif 1093-1093 | |
| (subclass Hydrogen ElementalSubstance) | Mid-level-ontology.kif 27255-27255 | |
| (subclass Helium ElementalSubstance) | Mid-level-ontology.kif 27271-27271 | |
| (subclass Lithium ElementalSubstance) | Mid-level-ontology.kif 27287-27287 | |
| (subclass Beryllium ElementalSubstance) | Mid-level-ontology.kif 27301-27301 | |
| (subclass Boron ElementalSubstance) | Mid-level-ontology.kif 27317-27317 | |
| (subclass Carbon ElementalSubstance) | Mid-level-ontology.kif 27336-27336 | |
| (subclass Nitrogen ElementalSubstance) | Mid-level-ontology.kif 27354-27354 | |
| (subclass Oxygen ElementalSubstance) | Mid-level-ontology.kif 27372-27372 | |
| (subclass Fluorine ElementalSubstance) | Mid-level-ontology.kif 27392-27392 | |
| (subclass Neon ElementalSubstance) | Mid-level-ontology.kif 27409-27409 | |
| (subclass Sodium ElementalSubstance) | Mid-level-ontology.kif 27427-27427 | |
| (subclass Magnesium ElementalSubstance) | Mid-level-ontology.kif 27443-27443 | |
| (subclass Aluminum ElementalSubstance) | Mid-level-ontology.kif 27461-27461 | |
| (subclass Silicon ElementalSubstance) | Mid-level-ontology.kif 27479-27479 | |
| (subclass Phosphorus ElementalSubstance) | Mid-level-ontology.kif 27496-27496 | |
| (subclass Sulphur ElementalSubstance) | Mid-level-ontology.kif 27511-27511 | |
| (subclass Chlorine ElementalSubstance) | Mid-level-ontology.kif 27527-27527 | |
| (subclass Argon ElementalSubstance) | Mid-level-ontology.kif 27544-27544 | |
| (subclass Potassium ElementalSubstance) | Mid-level-ontology.kif 27559-27559 | |
| (subclass Calcium ElementalSubstance) | Mid-level-ontology.kif 27575-27575 | |
| (subclass Scandium ElementalSubstance) | Mid-level-ontology.kif 27590-27590 | |
| (subclass Titanium ElementalSubstance) | Mid-level-ontology.kif 27606-27606 | |
| (subclass Vanadium ElementalSubstance) | Mid-level-ontology.kif 27622-27622 | |
| (subclass Chromium ElementalSubstance) | Mid-level-ontology.kif 27649-27649 | |
| (subclass Manganese ElementalSubstance) | Mid-level-ontology.kif 27663-27663 | |
| (subclass Iron ElementalSubstance) | Mid-level-ontology.kif 27678-27678 | |
| (subclass Cobalt ElementalSubstance) | Mid-level-ontology.kif 27695-27695 | |
| (subclass Nickel ElementalSubstance) | Mid-level-ontology.kif 27712-27712 | |
| (subclass Copper ElementalSubstance) | Mid-level-ontology.kif 27726-27726 | |
| (subclass Zinc ElementalSubstance) | Mid-level-ontology.kif 27742-27742 | |
| (subclass Gallium ElementalSubstance) | Mid-level-ontology.kif 27758-27758 | |
| (subclass Germanium ElementalSubstance) | Mid-level-ontology.kif 27776-27776 | |
| (subclass Arsenic ElementalSubstance) | Mid-level-ontology.kif 27792-27792 | |
| (subclass Selenium ElementalSubstance) | Mid-level-ontology.kif 27808-27808 | |
| (subclass Bromine ElementalSubstance) | Mid-level-ontology.kif 27823-27823 | |
| (subclass Krypton ElementalSubstance) | Mid-level-ontology.kif 27839-27839 | |
| (subclass Rubidium ElementalSubstance) | Mid-level-ontology.kif 27859-27859 | |
| (subclass Strontium ElementalSubstance) | Mid-level-ontology.kif 27876-27876 | |
| (subclass Yttrium ElementalSubstance) | Mid-level-ontology.kif 27893-27893 | |
| (subclass Zirconium ElementalSubstance) | Mid-level-ontology.kif 27910-27910 | |
| (subclass Niobium ElementalSubstance) | Mid-level-ontology.kif 27926-27926 | |
| (subclass Molybdenum ElementalSubstance) | Mid-level-ontology.kif 27943-27943 | |
| (subclass Technetium ElementalSubstance) | Mid-level-ontology.kif 27966-27966 | |
| (subclass Ruthenium ElementalSubstance) | Mid-level-ontology.kif 27985-27985 | |
| (subclass Rhodium ElementalSubstance) | Mid-level-ontology.kif 28001-28001 | |
| (subclass Palladium ElementalSubstance) | Mid-level-ontology.kif 28016-28016 | |
| (subclass Silver ElementalSubstance) | Mid-level-ontology.kif 28032-28032 | |
| (subclass Cadmium ElementalSubstance) | Mid-level-ontology.kif 28047-28047 | |
| (subclass Indium ElementalSubstance) | Mid-level-ontology.kif 28063-28063 | |
| (subclass Tin ElementalSubstance) | Mid-level-ontology.kif 28079-28079 | |
| (subclass Antimony ElementalSubstance) | Mid-level-ontology.kif 28095-28095 | |
| (subclass Tellurium ElementalSubstance) | Mid-level-ontology.kif 28112-28112 | |
| (subclass Iodine ElementalSubstance) | Mid-level-ontology.kif 28128-28128 | |
| (subclass Xenon ElementalSubstance) | Mid-level-ontology.kif 28146-28146 | |
| (subclass Caesium ElementalSubstance) | Mid-level-ontology.kif 28163-28163 | |
| (subclass Barium ElementalSubstance) | Mid-level-ontology.kif 28189-28189 | |
| (subclass Lanthanum ElementalSubstance) | Mid-level-ontology.kif 28205-28205 | |
| (subclass Cerium ElementalSubstance) | Mid-level-ontology.kif 28225-28225 | |
| (subclass Praseodymium ElementalSubstance) | Mid-level-ontology.kif 28242-28242 | |
| (subclass Neodymium ElementalSubstance) | Mid-level-ontology.kif 28258-28258 | |
| (subclass Promethium ElementalSubstance) | Mid-level-ontology.kif 28284-28284 | |
| (subclass Samarium ElementalSubstance) | Mid-level-ontology.kif 28304-28304 | |
| (subclass Europium ElementalSubstance) | Mid-level-ontology.kif 28325-28325 | |
| (subclass Gadolinium ElementalSubstance) | Mid-level-ontology.kif 28341-28341 | |
| (subclass Terbium ElementalSubstance) | Mid-level-ontology.kif 28358-28358 | |
| (subclass Dysprosium ElementalSubstance) | Mid-level-ontology.kif 28373-28373 | |
| (subclass Holmium ElementalSubstance) | Mid-level-ontology.kif 28394-28394 | |
| (subclass Erbium ElementalSubstance) | Mid-level-ontology.kif 28419-28419 | |
| (subclass Thulium ElementalSubstance) | Mid-level-ontology.kif 28436-28436 | |
| (subclass Ytterbium ElementalSubstance) | Mid-level-ontology.kif 28452-28452 | |
| (subclass Lutetium ElementalSubstance) | Mid-level-ontology.kif 28467-28467 | |
| (subclass Hafnium ElementalSubstance) | Mid-level-ontology.kif 28489-28489 | |
| (subclass Tantalum ElementalSubstance) | Mid-level-ontology.kif 28505-28505 | |
| (subclass Tungsten ElementalSubstance) | Mid-level-ontology.kif 28522-28522 | |
| (subclass Rhenium ElementalSubstance) | Mid-level-ontology.kif 28538-28538 | |
| (subclass Osmium ElementalSubstance) | Mid-level-ontology.kif 28553-28553 | |
| (subclass Iridium ElementalSubstance) | Mid-level-ontology.kif 28567-28567 | |
| (subclass Platinum ElementalSubstance) | Mid-level-ontology.kif 28591-28591 | |
| (subclass Gold ElementalSubstance) | Mid-level-ontology.kif 28617-28617 | |
| (subclass Mercury ElementalSubstance) | Mid-level-ontology.kif 28638-28638 | |
| (subclass Thallium ElementalSubstance) | Mid-level-ontology.kif 28655-28655 | |
| (subclass Lead ElementalSubstance) | Mid-level-ontology.kif 28677-28677 | |
| (subclass Bismuth ElementalSubstance) | Mid-level-ontology.kif 28693-28693 | |
| (subclass Polonium ElementalSubstance) | Mid-level-ontology.kif 28711-28711 | |
| (subclass Astatine ElementalSubstance) | Mid-level-ontology.kif 28728-28728 | |
| (subclass Radon ElementalSubstance) | Mid-level-ontology.kif 28745-28745 | |
| (subclass Francium ElementalSubstance) | Mid-level-ontology.kif 28763-28763 | |
| (subclass Radium ElementalSubstance) | Mid-level-ontology.kif 28779-28779 | |
| (subclass Actinium ElementalSubstance) | Mid-level-ontology.kif 28795-28795 | |
| (subclass Thorium ElementalSubstance) | Mid-level-ontology.kif 28813-28813 | |
| (subclass Protactinium ElementalSubstance) | Mid-level-ontology.kif 28830-28830 | |
| (subclass Uranium ElementalSubstance) | Mid-level-ontology.kif 28847-28847 | |
| (subclass Neptunium ElementalSubstance) | Mid-level-ontology.kif 28863-28863 | |
| (subclass Plutonium ElementalSubstance) | Mid-level-ontology.kif 28881-28881 | |
| (subclass Americium ElementalSubstance) | Mid-level-ontology.kif 28901-28901 | |
| (subclass Curium ElementalSubstance) | Mid-level-ontology.kif 28918-28918 | |
| (subclass Berkelium ElementalSubstance) | Mid-level-ontology.kif 28935-28935 | |
| (subclass Californium ElementalSubstance) | Mid-level-ontology.kif 28952-28952 | |
| (subclass Einsteinium ElementalSubstance) | Mid-level-ontology.kif 28970-28970 | |
| (subclass Fermium ElementalSubstance) | Mid-level-ontology.kif 28990-28990 | |
| (subclass Mendelevium ElementalSubstance) | Mid-level-ontology.kif 29006-29006 | |
| (subclass Nobelium ElementalSubstance) | Mid-level-ontology.kif 29024-29024 | |
| (subclass Lawrencium ElementalSubstance) | Mid-level-ontology.kif 29041-29041 | |
| (subclass Unnilquadium ElementalSubstance) | Mid-level-ontology.kif 29063-29063 | |
| (subclass Unnilpentium ElementalSubstance) | Mid-level-ontology.kif 29080-29080 | |
| (subclass Unnilhexium ElementalSubstance) | Mid-level-ontology.kif 29095-29095 | |
| (subclass Unnilseptium ElementalSubstance) | Mid-level-ontology.kif 29110-29110 | |
| (subclass Unniloctium ElementalSubstance) | Mid-level-ontology.kif 29125-29125 | |
| (subclass Meitnerium ElementalSubstance) | Mid-level-ontology.kif 29138-29138 | |
| (subclass Unnildecium ElementalSubstance) | Mid-level-ontology.kif 29155-29155 | |
| (subclass Metal ElementalSubstance) | Merge.kif 1101-1101 | |
| (subclass Atom ElementalSubstance) | Merge.kif 1108-1108 | |
| (subclass SubatomicParticle ElementalSubstance) | Merge.kif 1133-1133 |
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