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Definitions of
halogen
:
noun
:
any of five related nonmetallic elements (
fluorine
or
chlorine
or
bromine
or
iodine
or astatine) that are all monovalent and readily form negative ions
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Alternative Terms
fluorine
chlorine
bromine
iodine
astatine
halogen
crust
gradation
markedly-3
halide
ammonium-halide
europium-halide
interhalogen-compounds
interhalogen
transition-element
silicon
incandescent-light-bulb