View synonyms for halogen

halogen

[ hal-uh-juhn, -jen, hey-luh- ]

Phonetic (Standard)IPA

noun

, Chemistry.

any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals.

halogen

/ ˈhæləˌdʒɛn; həˈlɒdʒɪnəs /

any of the chemical elements fluorine, chlorine, bromine, iodine, and astatine. They are all monovalent and readily form negative ions

halogen

/ hăl′ə-jən /

Any of a group of five nonmetallic elements with similar properties. The halogens are fluorine, chlorine, bromine, iodine, and astatine. Because they are missing an electron from their outermost shell, they react readily with most metals to form salts.
See Periodic Table

Origin of halogen¹

First recorded in 1835–45; halo- + -gen

Origin of halogen¹

C19: from Swedish; see halo- , -gen

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.

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