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| [[Chemical series|Chemical Series]] | | [[Chemical series|Chemical Series]] | ||
| | | Halogens | ||
|- | |- | ||
| Appearance | | Appearance | ||
|greenish yellow <br> [[image:Sample potassium.jpg|150px]] | |greenish yellow,or yellowish green <br> [[image:Sample potassium.jpg|150px]] | ||
|- | |- | ||
| [[Periodic table group|Group]], [[Periodic table period|Period]], [[Periodic table block|Block]] | | [[Periodic table group|Group]], [[Periodic table period|Period]], [[Periodic table block|Block]] |
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