halogen
卤素,卤素灯,卤化物,卤族
Related Words
Definitions
- 1
Chemistry.
- : any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals.
Synonyms & Antonyms
Examples
New, long-lasting LED bulbs and smartphone controls have carried traditional halogen floodlights into the 21st century, while additional built-in cameras and alarms add a new layer to create security lighting.
That’s roughly equal to a 300W halogen floodlight, which is plenty for outdoor security use.
The light of halogen lamps is slightly more “whiteish” than incandescent lamps.
There is a group of closely allied elements to which the name halogen (salt-producer) has been given.
Compounds containing oxides and fluorides, &c., do not lend themselves to the method of determining the halogen by difference.
We may, in fact, consider that the descriptive study of the various halogen compounds dates from about this time.
The same absorbent quantitatively takes up any halogen and sulphur which may be present.
The same as Method 1, except that after ignition of the saponified mixture the halogen was determined by weighing as silver iodid.