Selenium

Naming and classification


Other names/abbreviations: Se
Element no: 34
Element group: 16 (IUPAC)
VI A (American labelling)
VI B (European labelling)
Chalcogens
Element type: Nonmetal, sometimes classified as metalloid
CAS-Number: CAS- and EINECS-Number list 7782-49-2
EINECS-Number: CAS- and EINECS-Number list 231-957-4