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Absorption Spectra of Saturated Chlorides of Multivalent Elements.
- Source :
- Nature; April 1931, Vol. 127 Issue: 3208 p625-626, 2p
- Publication Year :
- 1931
-
Abstract
- FRANCK and his co-workers have shown that the vapours of alkali halides show a continuous absorption spectrum beginning from a long waverlength limit and extending towards the ultra-violet. He interpreted the absorption spectrum as follows : if we take a substance like sodium chloride the valency electron of Na in the normal state may be supposed to pass over completely to Cl and the combination consists of Na+Cl-. Such a combination is called ionic. When light falls on sodium chloride vapour, the electron passes over from Cl-to Na+, the molecule thus splitting into Na and Cl. Franck obtains the heat of formation Q of NaCl from atomic Na and atomic Cl with the aid of a Born cycle and finds that Q =N hν where ν = frequency of the beginning of continuous absorption.
Details
- Language :
- English
- ISSN :
- 00280836 and 14764687
- Volume :
- 127
- Issue :
- 3208
- Database :
- Supplemental Index
- Journal :
- Nature
- Publication Type :
- Periodical
- Accession number :
- ejs23950698
- Full Text :
- https://doi.org/10.1038/127625b0