| (subclass ElementalSubstance PureSubstance) | Merge.kif 1017-1017 | |
| (subclass Hydrogen ElementalSubstance) | Mid-level-ontology.kif 25523-25523 | |
| (subclass Helium ElementalSubstance) | Mid-level-ontology.kif 25538-25538 | |
| (subclass Lithium ElementalSubstance) | Mid-level-ontology.kif 25553-25553 | |
| (subclass Beryllium ElementalSubstance) | Mid-level-ontology.kif 25566-25566 | |
| (subclass Boron ElementalSubstance) | Mid-level-ontology.kif 25581-25581 | |
| (subclass Carbon ElementalSubstance) | Mid-level-ontology.kif 25599-25599 | |
| (subclass Nitrogen ElementalSubstance) | Mid-level-ontology.kif 25616-25616 | |
| (subclass Oxygen ElementalSubstance) | Mid-level-ontology.kif 25633-25633 | |
| (subclass Fluorine ElementalSubstance) | Mid-level-ontology.kif 25652-25652 | |
| (subclass Neon ElementalSubstance) | Mid-level-ontology.kif 25668-25668 | |
| (subclass Sodium ElementalSubstance) | Mid-level-ontology.kif 25685-25685 | |
| (subclass Magnesium ElementalSubstance) | Mid-level-ontology.kif 25700-25700 | |
| (subclass Aluminum ElementalSubstance) | Mid-level-ontology.kif 25717-25717 | |
| (subclass Silicon ElementalSubstance) | Mid-level-ontology.kif 25734-25734 | |
| (subclass Phosphorus ElementalSubstance) | Mid-level-ontology.kif 25750-25750 | |
| (subclass Sulphur ElementalSubstance) | Mid-level-ontology.kif 25764-25764 | |
| (subclass Chlorine ElementalSubstance) | Mid-level-ontology.kif 25779-25779 | |
| (subclass Argon ElementalSubstance) | Mid-level-ontology.kif 25795-25795 | |
| (subclass Potassium ElementalSubstance) | Mid-level-ontology.kif 25809-25809 | |
| (subclass Calcium ElementalSubstance) | Mid-level-ontology.kif 25824-25824 | |
| (subclass Scandium ElementalSubstance) | Mid-level-ontology.kif 25838-25838 | |
| (subclass Titanium ElementalSubstance) | Mid-level-ontology.kif 25853-25853 | |
| (subclass Vanadium ElementalSubstance) | Mid-level-ontology.kif 25868-25868 | |
| (subclass Chromium ElementalSubstance) | Mid-level-ontology.kif 25894-25894 | |
| (subclass Manganese ElementalSubstance) | Mid-level-ontology.kif 25907-25907 | |
| (subclass Iron ElementalSubstance) | Mid-level-ontology.kif 25921-25921 | |
| (subclass Cobalt ElementalSubstance) | Mid-level-ontology.kif 25937-25937 | |
| (subclass Nickel ElementalSubstance) | Mid-level-ontology.kif 25953-25953 | |
| (subclass Copper ElementalSubstance) | Mid-level-ontology.kif 25966-25966 | |
| (subclass Zinc ElementalSubstance) | Mid-level-ontology.kif 25981-25981 | |
| (subclass Gallium ElementalSubstance) | Mid-level-ontology.kif 25996-25996 | |
| (subclass Germanium ElementalSubstance) | Mid-level-ontology.kif 26013-26013 | |
| (subclass Arsenic ElementalSubstance) | Mid-level-ontology.kif 26028-26028 | |
| (subclass Selenium ElementalSubstance) | Mid-level-ontology.kif 26043-26043 | |
| (subclass Bromine ElementalSubstance) | Mid-level-ontology.kif 26057-26057 | |
| (subclass Krypton ElementalSubstance) | Mid-level-ontology.kif 26072-26072 | |
| (subclass Rubidium ElementalSubstance) | Mid-level-ontology.kif 26091-26091 | |
| (subclass Strontium ElementalSubstance) | Mid-level-ontology.kif 26107-26107 | |
| (subclass Yttrium ElementalSubstance) | Mid-level-ontology.kif 26123-26123 | |
| (subclass Zirconium ElementalSubstance) | Mid-level-ontology.kif 26139-26139 | |
| (subclass Niobium ElementalSubstance) | Mid-level-ontology.kif 26154-26154 | |
| (subclass Molybdenum ElementalSubstance) | Mid-level-ontology.kif 26170-26170 | |
| (subclass Technetium ElementalSubstance) | Mid-level-ontology.kif 26192-26192 | |
| (subclass Ruthenium ElementalSubstance) | Mid-level-ontology.kif 26210-26210 | |
| (subclass Rhodium ElementalSubstance) | Mid-level-ontology.kif 26225-26225 | |
| (subclass Palladium ElementalSubstance) | Mid-level-ontology.kif 26239-26239 | |
| (subclass Silver ElementalSubstance) | Mid-level-ontology.kif 26254-26254 | |
| (subclass Cadmium ElementalSubstance) | Mid-level-ontology.kif 26268-26268 | |
| (subclass Indium ElementalSubstance) | Mid-level-ontology.kif 26283-26283 | |
| (subclass Tin ElementalSubstance) | Mid-level-ontology.kif 26298-26298 | |
| (subclass Antimony ElementalSubstance) | Mid-level-ontology.kif 26313-26313 | |
| (subclass Tellurium ElementalSubstance) | Mid-level-ontology.kif 26329-26329 | |
| (subclass Iodine ElementalSubstance) | Mid-level-ontology.kif 26344-26344 | |
| (subclass Xenon ElementalSubstance) | Mid-level-ontology.kif 26361-26361 | |
| (subclass Caesium ElementalSubstance) | Mid-level-ontology.kif 26377-26377 | |
| (subclass Barium ElementalSubstance) | Mid-level-ontology.kif 26402-26402 | |
| (subclass Lanthanum ElementalSubstance) | Mid-level-ontology.kif 26417-26417 | |
| (subclass Cerium ElementalSubstance) | Mid-level-ontology.kif 26436-26436 | |
| (subclass Praseodymium ElementalSubstance) | Mid-level-ontology.kif 26452-26452 | |
| (subclass Neodymium ElementalSubstance) | Mid-level-ontology.kif 26467-26467 | |
| (subclass Promethium ElementalSubstance) | Mid-level-ontology.kif 26492-26492 | |
| (subclass Samarium ElementalSubstance) | Mid-level-ontology.kif 26511-26511 | |
| (subclass Europium ElementalSubstance) | Mid-level-ontology.kif 26531-26531 | |
| (subclass Gadolinium ElementalSubstance) | Mid-level-ontology.kif 26546-26546 | |
| (subclass Terbium ElementalSubstance) | Mid-level-ontology.kif 26562-26562 | |
| (subclass Dysprosium ElementalSubstance) | Mid-level-ontology.kif 26576-26576 | |
| (subclass Holmium ElementalSubstance) | Mid-level-ontology.kif 26596-26596 | |
| (subclass Erbium ElementalSubstance) | Mid-level-ontology.kif 26620-26620 | |
| (subclass Thulium ElementalSubstance) | Mid-level-ontology.kif 26636-26636 | |
| (subclass Ytterbium ElementalSubstance) | Mid-level-ontology.kif 26651-26651 | |
| (subclass Lutetium ElementalSubstance) | Mid-level-ontology.kif 26665-26665 | |
| (subclass Hafnium ElementalSubstance) | Mid-level-ontology.kif 26686-26686 | |
| (subclass Tantalum ElementalSubstance) | Mid-level-ontology.kif 26701-26701 | |
| (subclass Tungsten ElementalSubstance) | Mid-level-ontology.kif 26717-26717 | |
| (subclass Rhenium ElementalSubstance) | Mid-level-ontology.kif 26732-26732 | |
| (subclass Osmium ElementalSubstance) | Mid-level-ontology.kif 26746-26746 | |
| (subclass Iridium ElementalSubstance) | Mid-level-ontology.kif 26759-26759 | |
| (subclass Platinum ElementalSubstance) | Mid-level-ontology.kif 26782-26782 | |
| (subclass Gold ElementalSubstance) | Mid-level-ontology.kif 26807-26807 | |
| (subclass Mercury ElementalSubstance) | Mid-level-ontology.kif 26827-26827 | |
| (subclass Thallium ElementalSubstance) | Mid-level-ontology.kif 26843-26843 | |
| (subclass Lead ElementalSubstance) | Mid-level-ontology.kif 26864-26864 | |
| (subclass Bismuth ElementalSubstance) | Mid-level-ontology.kif 26879-26879 | |
| (subclass Polonium ElementalSubstance) | Mid-level-ontology.kif 26896-26896 | |
| (subclass Astatine ElementalSubstance) | Mid-level-ontology.kif 26912-26912 | |
| (subclass Radon ElementalSubstance) | Mid-level-ontology.kif 26928-26928 | |
| (subclass Francium ElementalSubstance) | Mid-level-ontology.kif 26945-26945 | |
| (subclass Radium ElementalSubstance) | Mid-level-ontology.kif 26960-26960 | |
| (subclass Actinium ElementalSubstance) | Mid-level-ontology.kif 26975-26975 | |
| (subclass Thorium ElementalSubstance) | Mid-level-ontology.kif 26992-26992 | |
| (subclass Protactinium ElementalSubstance) | Mid-level-ontology.kif 27008-27008 | |
| (subclass Uranium ElementalSubstance) | Mid-level-ontology.kif 27024-27024 | |
| (subclass Neptunium ElementalSubstance) | Mid-level-ontology.kif 27039-27039 | |
| (subclass Plutonium ElementalSubstance) | Mid-level-ontology.kif 27056-27056 | |
| (subclass Americium ElementalSubstance) | Mid-level-ontology.kif 27075-27075 | |
| (subclass Curium ElementalSubstance) | Mid-level-ontology.kif 27091-27091 | |
| (subclass Berkelium ElementalSubstance) | Mid-level-ontology.kif 27107-27107 | |
| (subclass Californium ElementalSubstance) | Mid-level-ontology.kif 27123-27123 | |
| (subclass Einsteinium ElementalSubstance) | Mid-level-ontology.kif 27140-27140 | |
| (subclass Fermium ElementalSubstance) | Mid-level-ontology.kif 27159-27159 | |
| (subclass Mendelevium ElementalSubstance) | Mid-level-ontology.kif 27174-27174 | |
| (subclass Nobelium ElementalSubstance) | Mid-level-ontology.kif 27191-27191 | |
| (subclass Lawrencium ElementalSubstance) | Mid-level-ontology.kif 27207-27207 | |
| (subclass Unnilquadium ElementalSubstance) | Mid-level-ontology.kif 27228-27228 | |
| (subclass Unnilpentium ElementalSubstance) | Mid-level-ontology.kif 27244-27244 | |
| (subclass Unnilhexium ElementalSubstance) | Mid-level-ontology.kif 27258-27258 | |
| (subclass Unnilseptium ElementalSubstance) | Mid-level-ontology.kif 27272-27272 | |
| (subclass Unniloctium ElementalSubstance) | Mid-level-ontology.kif 27286-27286 | |
| (subclass Meitnerium ElementalSubstance) | Mid-level-ontology.kif 27298-27298 | |
| (subclass Unnildecium ElementalSubstance) | Mid-level-ontology.kif 27314-27314 | |
| (subclass Metal ElementalSubstance) | Merge.kif 1025-1025 | |
| (subclass Atom ElementalSubstance) | Merge.kif 1032-1032 | |
| (subclass SubatomicParticle ElementalSubstance) | Merge.kif 1057-1057 |
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