Halogens Quiz

Can you name and identify the reactive elements of Group 17? Test your halogen knowledge now!

Element	Symbol	Atomic Number	Physical State	Use
Fluorine	F	9	Gas	Toothpaste (fluoride)
Chlorine	Cl	17	Gas	Disinfectants, bleach
Bromine	Br	35	Liquid	Photography, dyes
Iodine	I	53	Solid	Medical antiseptics
Astatine	At	85	Solid (rare)	Radioactive research

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Halogens are Group 17 elements in the periodic table. They are highly reactive nonmetals that form salts when reacting with metals.

Reactivity decreases down the group. Fluorine is the most reactive halogen, while astatine is the least reactive.

Halogens have many uses: fluorine in toothpaste, chlorine in disinfectants, bromine in photography, and iodine in antiseptics.

Test your knowledge of Group 17 elements with this interactive quiz.

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Last Updated: Aug 18, 2025

Added more MCQs to test your knowledge of the highly reactive Group 17 elements (F, Cl, Br, I, At, Ts).

What are halogens?