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</html><description>Halogenen zijn een groep elementen die voorkomen in groep 17 (ook wel de halogeengroep genoemd) van het periodiek systeem . Halogenen omvatten vijf verschillende elementen: fluor (F), chloor (Cl), broom (Br), jodium (I) en astatine (At). Halogenen zijn uniek omdat ze de enige groep elementen zijn die verbindingen kunnen vormen met alle andere elementen in ... Lees verder</description><thumbnail_url>https://chemuza.org/wp-content/uploads/2023/08/tableau-periodique-des-halogenes.jpg</thumbnail_url></oembed>
