Period21predicamentsium is a hypothetical element with the atomic number 4633. It is named after the predicaments in period 21 with the atomic numbers. Like all elements after lead (excluding anomalies), Period21predicamentsium has no stable isotopes. Its most stable isotope is 24691P21p.
Isotopes[]
Period21predicamentsium has no stable isotopes. Its most stable isotope is 24691P21p, which has a half life of 5.555×10-22 seconds. The rest of the isotopes have a half life no longer than 2.222×22-22 (6.50796302×10-30) seconds.
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