halogen
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
Any of a group of highly reactive chemical elements, including fluorine, chlorine, bromine, and iodine, found near the right side of the periodic table.
Test yourself
Which word fits the gap? "Chlorine, a _____, is commonly used to disinfect swimming pools."
Answer: halogen
In your own words, what does "halogen" mean?
Any of a group of highly reactive chemical elements, including fluorine, chlorine, bromine, and iodine, found near the right side of the periodic table.
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