We mentioned several superheavy elements that hadbeen observed but not yet confi rmed or
Chapter 13, Problem 54(choose chapter or problem)
We mentioned several superheavy elements that hadbeen observed but not yet confi rmed or offi ciallyapproved by the International Union of Pure andApplied Chemistry (IUPAC). (a) List those elements.(b) Research and discuss their status: Have they beenconfi rmed? Has IUPAC approved them?
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