| (subclass ElementalSubstance PureSubstance) | Merge.kif 1093-1093 | |
| (subclass Hydrogen ElementalSubstance) | Mid-level-ontology.kif 27267-27267 | |
| (subclass Helium ElementalSubstance) | Mid-level-ontology.kif 27283-27283 | |
| (subclass Lithium ElementalSubstance) | Mid-level-ontology.kif 27299-27299 | |
| (subclass Beryllium ElementalSubstance) | Mid-level-ontology.kif 27313-27313 | |
| (subclass Boron ElementalSubstance) | Mid-level-ontology.kif 27329-27329 | |
| (subclass Carbon ElementalSubstance) | Mid-level-ontology.kif 27348-27348 | |
| (subclass Nitrogen ElementalSubstance) | Mid-level-ontology.kif 27366-27366 | |
| (subclass Oxygen ElementalSubstance) | Mid-level-ontology.kif 27384-27384 | |
| (subclass Fluorine ElementalSubstance) | Mid-level-ontology.kif 27404-27404 | |
| (subclass Neon ElementalSubstance) | Mid-level-ontology.kif 27421-27421 | |
| (subclass Sodium ElementalSubstance) | Mid-level-ontology.kif 27439-27439 | |
| (subclass Magnesium ElementalSubstance) | Mid-level-ontology.kif 27455-27455 | |
| (subclass Aluminum ElementalSubstance) | Mid-level-ontology.kif 27473-27473 | |
| (subclass Silicon ElementalSubstance) | Mid-level-ontology.kif 27491-27491 | |
| (subclass Phosphorus ElementalSubstance) | Mid-level-ontology.kif 27508-27508 | |
| (subclass Sulphur ElementalSubstance) | Mid-level-ontology.kif 27523-27523 | |
| (subclass Chlorine ElementalSubstance) | Mid-level-ontology.kif 27539-27539 | |
| (subclass Argon ElementalSubstance) | Mid-level-ontology.kif 27556-27556 | |
| (subclass Potassium ElementalSubstance) | Mid-level-ontology.kif 27571-27571 | |
| (subclass Calcium ElementalSubstance) | Mid-level-ontology.kif 27587-27587 | |
| (subclass Scandium ElementalSubstance) | Mid-level-ontology.kif 27602-27602 | |
| (subclass Titanium ElementalSubstance) | Mid-level-ontology.kif 27618-27618 | |
| (subclass Vanadium ElementalSubstance) | Mid-level-ontology.kif 27634-27634 | |
| (subclass Chromium ElementalSubstance) | Mid-level-ontology.kif 27661-27661 | |
| (subclass Manganese ElementalSubstance) | Mid-level-ontology.kif 27675-27675 | |
| (subclass Iron ElementalSubstance) | Mid-level-ontology.kif 27690-27690 | |
| (subclass Cobalt ElementalSubstance) | Mid-level-ontology.kif 27707-27707 | |
| (subclass Nickel ElementalSubstance) | Mid-level-ontology.kif 27724-27724 | |
| (subclass Copper ElementalSubstance) | Mid-level-ontology.kif 27738-27738 | |
| (subclass Zinc ElementalSubstance) | Mid-level-ontology.kif 27754-27754 | |
| (subclass Gallium ElementalSubstance) | Mid-level-ontology.kif 27770-27770 | |
| (subclass Germanium ElementalSubstance) | Mid-level-ontology.kif 27788-27788 | |
| (subclass Arsenic ElementalSubstance) | Mid-level-ontology.kif 27804-27804 | |
| (subclass Selenium ElementalSubstance) | Mid-level-ontology.kif 27820-27820 | |
| (subclass Bromine ElementalSubstance) | Mid-level-ontology.kif 27835-27835 | |
| (subclass Krypton ElementalSubstance) | Mid-level-ontology.kif 27851-27851 | |
| (subclass Rubidium ElementalSubstance) | Mid-level-ontology.kif 27871-27871 | |
| (subclass Strontium ElementalSubstance) | Mid-level-ontology.kif 27888-27888 | |
| (subclass Yttrium ElementalSubstance) | Mid-level-ontology.kif 27905-27905 | |
| (subclass Zirconium ElementalSubstance) | Mid-level-ontology.kif 27922-27922 | |
| (subclass Niobium ElementalSubstance) | Mid-level-ontology.kif 27938-27938 | |
| (subclass Molybdenum ElementalSubstance) | Mid-level-ontology.kif 27955-27955 | |
| (subclass Technetium ElementalSubstance) | Mid-level-ontology.kif 27978-27978 | |
| (subclass Ruthenium ElementalSubstance) | Mid-level-ontology.kif 27997-27997 | |
| (subclass Rhodium ElementalSubstance) | Mid-level-ontology.kif 28013-28013 | |
| (subclass Palladium ElementalSubstance) | Mid-level-ontology.kif 28028-28028 | |
| (subclass Silver ElementalSubstance) | Mid-level-ontology.kif 28044-28044 | |
| (subclass Cadmium ElementalSubstance) | Mid-level-ontology.kif 28059-28059 | |
| (subclass Indium ElementalSubstance) | Mid-level-ontology.kif 28075-28075 | |
| (subclass Tin ElementalSubstance) | Mid-level-ontology.kif 28091-28091 | |
| (subclass Antimony ElementalSubstance) | Mid-level-ontology.kif 28107-28107 | |
| (subclass Tellurium ElementalSubstance) | Mid-level-ontology.kif 28124-28124 | |
| (subclass Iodine ElementalSubstance) | Mid-level-ontology.kif 28140-28140 | |
| (subclass Xenon ElementalSubstance) | Mid-level-ontology.kif 28158-28158 | |
| (subclass Caesium ElementalSubstance) | Mid-level-ontology.kif 28175-28175 | |
| (subclass Barium ElementalSubstance) | Mid-level-ontology.kif 28201-28201 | |
| (subclass Lanthanum ElementalSubstance) | Mid-level-ontology.kif 28217-28217 | |
| (subclass Cerium ElementalSubstance) | Mid-level-ontology.kif 28237-28237 | |
| (subclass Praseodymium ElementalSubstance) | Mid-level-ontology.kif 28254-28254 | |
| (subclass Neodymium ElementalSubstance) | Mid-level-ontology.kif 28270-28270 | |
| (subclass Promethium ElementalSubstance) | Mid-level-ontology.kif 28296-28296 | |
| (subclass Samarium ElementalSubstance) | Mid-level-ontology.kif 28316-28316 | |
| (subclass Europium ElementalSubstance) | Mid-level-ontology.kif 28337-28337 | |
| (subclass Gadolinium ElementalSubstance) | Mid-level-ontology.kif 28353-28353 | |
| (subclass Terbium ElementalSubstance) | Mid-level-ontology.kif 28370-28370 | |
| (subclass Dysprosium ElementalSubstance) | Mid-level-ontology.kif 28385-28385 | |
| (subclass Holmium ElementalSubstance) | Mid-level-ontology.kif 28406-28406 | |
| (subclass Erbium ElementalSubstance) | Mid-level-ontology.kif 28431-28431 | |
| (subclass Thulium ElementalSubstance) | Mid-level-ontology.kif 28448-28448 | |
| (subclass Ytterbium ElementalSubstance) | Mid-level-ontology.kif 28464-28464 | |
| (subclass Lutetium ElementalSubstance) | Mid-level-ontology.kif 28479-28479 | |
| (subclass Hafnium ElementalSubstance) | Mid-level-ontology.kif 28501-28501 | |
| (subclass Tantalum ElementalSubstance) | Mid-level-ontology.kif 28517-28517 | |
| (subclass Tungsten ElementalSubstance) | Mid-level-ontology.kif 28534-28534 | |
| (subclass Rhenium ElementalSubstance) | Mid-level-ontology.kif 28550-28550 | |
| (subclass Osmium ElementalSubstance) | Mid-level-ontology.kif 28565-28565 | |
| (subclass Iridium ElementalSubstance) | Mid-level-ontology.kif 28579-28579 | |
| (subclass Platinum ElementalSubstance) | Mid-level-ontology.kif 28603-28603 | |
| (subclass Gold ElementalSubstance) | Mid-level-ontology.kif 28629-28629 | |
| (subclass Mercury ElementalSubstance) | Mid-level-ontology.kif 28650-28650 | |
| (subclass Thallium ElementalSubstance) | Mid-level-ontology.kif 28667-28667 | |
| (subclass Lead ElementalSubstance) | Mid-level-ontology.kif 28689-28689 | |
| (subclass Bismuth ElementalSubstance) | Mid-level-ontology.kif 28705-28705 | |
| (subclass Polonium ElementalSubstance) | Mid-level-ontology.kif 28723-28723 | |
| (subclass Astatine ElementalSubstance) | Mid-level-ontology.kif 28740-28740 | |
| (subclass Radon ElementalSubstance) | Mid-level-ontology.kif 28757-28757 | |
| (subclass Francium ElementalSubstance) | Mid-level-ontology.kif 28775-28775 | |
| (subclass Radium ElementalSubstance) | Mid-level-ontology.kif 28791-28791 | |
| (subclass Actinium ElementalSubstance) | Mid-level-ontology.kif 28807-28807 | |
| (subclass Thorium ElementalSubstance) | Mid-level-ontology.kif 28825-28825 | |
| (subclass Protactinium ElementalSubstance) | Mid-level-ontology.kif 28842-28842 | |
| (subclass Uranium ElementalSubstance) | Mid-level-ontology.kif 28859-28859 | |
| (subclass Neptunium ElementalSubstance) | Mid-level-ontology.kif 28875-28875 | |
| (subclass Plutonium ElementalSubstance) | Mid-level-ontology.kif 28893-28893 | |
| (subclass Americium ElementalSubstance) | Mid-level-ontology.kif 28913-28913 | |
| (subclass Curium ElementalSubstance) | Mid-level-ontology.kif 28930-28930 | |
| (subclass Berkelium ElementalSubstance) | Mid-level-ontology.kif 28947-28947 | |
| (subclass Californium ElementalSubstance) | Mid-level-ontology.kif 28964-28964 | |
| (subclass Einsteinium ElementalSubstance) | Mid-level-ontology.kif 28982-28982 | |
| (subclass Fermium ElementalSubstance) | Mid-level-ontology.kif 29002-29002 | |
| (subclass Mendelevium ElementalSubstance) | Mid-level-ontology.kif 29018-29018 | |
| (subclass Nobelium ElementalSubstance) | Mid-level-ontology.kif 29036-29036 | |
| (subclass Lawrencium ElementalSubstance) | Mid-level-ontology.kif 29053-29053 | |
| (subclass Unnilquadium ElementalSubstance) | Mid-level-ontology.kif 29075-29075 | |
| (subclass Unnilpentium ElementalSubstance) | Mid-level-ontology.kif 29092-29092 | |
| (subclass Unnilhexium ElementalSubstance) | Mid-level-ontology.kif 29107-29107 | |
| (subclass Unnilseptium ElementalSubstance) | Mid-level-ontology.kif 29122-29122 | |
| (subclass Unniloctium ElementalSubstance) | Mid-level-ontology.kif 29137-29137 | |
| (subclass Meitnerium ElementalSubstance) | Mid-level-ontology.kif 29150-29150 | |
| (subclass Unnildecium ElementalSubstance) | Mid-level-ontology.kif 29167-29167 | |
| (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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