📖 what
What is a halogen?
ChemistryElements
Quick Answer
A halogen is a Group 17 element on the periodic table. Halogens are very reactive nonmetals that often form salts with metals.
The Full Story
Halogens include fluorine, chlorine, bromine, iodine, astatine, and tennessine. They are one electron short of a full outer shell, which makes them eager to react. Fluorine is the most reactive of the group, while reactivity generally decreases as you go down the column. The word halogen means “salt former,” reflecting their tendency to combine with metals. Halogens are important in disinfection, medicine, lighting, and industrial chemistry.
Key Facts
1.Halogens are in Group 17
2.The name means 'salt former'
3.Fluorine is the most reactive halogen
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Suggested video title for this topic:
"The periodic table’s salt-makers and reactive nonmetals"