has_role potassium atom 0 38.96371 39.098 CHEBI:26216 ZLMJMSJWJFRBEC-UHFFFAOYSA-N Kalium kalium K webelements:K kegg.compound:C00238 potasio potassium K chebi_ontology [K] drugbank:DB01345 MESH:D011188 cas:7440-09-7 19K NCIt:C765 InChI=1S/K SNOMEDCT:88480006 potassium micronutrient metal atom