Experiments have been conducted to attempt the synthesis of ununennium ( Uue ), which is likely to be the next member of the group, but they have all met with failure .< ref name =" link "> However, ununennium may not be an alkali metal due to relativistic effects, which are predicted to have a large influence on the chemical properties of superheavy elements.

Experiments have been conducted to attempt the synthesis of unbinilium ( Ubn ), which is likely to be the next member of the group, but they have all met with failure.

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