subject | relation | object |
---|---|---|
chalcogen | is_a | p-block element atom (CHEBI:33560) |
subject | relation | object |
---|---|---|
selenium atom (CHEBI:27568) | is_a | chalcogen |
sulfur atom (CHEBI:26833) | is_a | chalcogen |
oxygen atom (CHEBI:25805) | is_a | chalcogen |
chalcogen molecular entity (CHEBI:33304) | BFO:0000051 | chalcogen |