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</html><description>Flerovium is een radioactief, synthetisch element dat niet in de aardkorst voorkomt. De productie ervan is kunstmatig en zeldzaam, omdat er slechts een paar atomen van het element worden verkregen. Er wordt geschat dat het bestaat uit zeven isotopen met massagetallen tussen 286 en 289, maar die onstabiel zijn en van korte duur zijn. Ontdek ... Lees verder</description></oembed>
