| 释义 |
chalcogen, n. Chem.
Brit. |ˈkalkədʒ(ə)n|, U.S. |ˈkælkədʒ(ə)n|
Forms: 19– chalcogen, 19– chalkogen[rare]
[‹ chalco- comb. form + -gen comb. form, after halogen n. Compare earlier chalcogenide n.]
Any of the elements in group 16 (group VIa) of the periodic table, comprising oxygen, sulphur, selenium, tellurium, and polonium.
The short-lived synthetic element 116 is sometimes also included.
1940W. P. Jorissen et al. in Jrnl. Chem. Soc. 1407 Report of the Committee of the International Union of Chemistry for the Reform of Inorganic Chemical Nomenclature... Compounds of the halogens are to be called halogenides.., while the elements oxygen, sulphur, selenium and tellurium may be called chalkogens, and their compounds chalkogenides. 1969Science 20 June 1354/3 The lithium{vb}chalcogen secondary cells have power densities second only to those of the Li{vb} Cl2 primary cell. 1994D. F. Shriver et al. Inorg. Chem. (ed. 2) xii. 529 Both SF4 and SeF4 are very selective fluorinating agents... Other halides of the chalcogens exist. |