Category:Halogens

This category concerns the topic: terms for types or instances of chemical elements in group 17 of the periodic table, which all have 7 valence electrons.

This category contains no dictionary entries, only other categories. The subcategories are of two sorts:

• Subcategories named like "aa:Halogens" (with a prefixed language code) are categories of terms in specific languages. You may be interested especially in Category:en:Halogens, for English terms.
• Subcategories of this one named without the prefixed language code are further categories just like this one, but devoted to finer topics.

NOTE: This is a set category. It should contain terms for halogens, not merely terms related to halogens. It may contain more general terms (e.g. types of halogens) or more specific terms (e.g. names of specific halogens), although there may be related categories specifically for these types of terms.