Category talk:Alkali metal halides

incomplete Subcategories
Most of the subcategories are incomplete, Why? In all Subcategories should be all 5 alkali metals be present, because all 4 major halides build compounds with all 5 major alkali metals. Is there any reason for this problem? --Erik 2003:86:8D7F:95D7:50CE:9C58:687C:236A (talk) 10:31, 7 May 2015 (UTC)