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Halogens

The reactive "salt-forming" group. Fluorine fights cavities, chlorine cleans pools, iodine guards your thyroid.

Quiz me on halogensOpen periodic table

The 6 halogens

9F

Fluorine

Period 2 · Group 17

19.00
17Cl

Chlorine

Period 3 · Group 17

35.45
35Br

Bromine

Period 4 · Group 17

79.90
53I

Iodine

Period 5 · Group 17

126.90
85At

Astatine

Period 6 · Group 17

210.00
117Ts

Tennessine

Period 7 · Group 17

294.00
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