| Row | IRI | Label | Issue |
|---|---|---|---|
| 0 | http://purl.obolibrary.org/obo/COB_0000800 | has atomic number | not an RO property |
| 1 | http://purl.obolibrary.org/obo/RBO_2000 | has atomic mass | not an RO property |
| 2 | http://purl.obolibrary.org/obo/RBO_2001 | mass number | not an RO property |