Chalcogenia sunt elementa chemica cum sex electronibus in sphaera electronica externa; igitur sunt eorum reactiones chemicae similis.
Inter chalcogenia numerantur
Quia configuratio electronium sphaerae externae aequa est, formulae molecularum similes sunt. Exempla:
- H2O; H2S; H2Se, H2Te;
- Na2O; Na2S; Na2Se, Na2Te;
- MgO; MgS; MgSe; MgTe;
Substantia illa appellatur oxida, sulphida vel sulphurata, selenida, tellurida.
- Jensen, William B. (September 1, 1997). "A Note on the Term "Chalcogen"". Journal of Chemical Education. 74 (9): 1063 Situs venalis
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