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Promethium is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely rare, with only about 500–600 grams naturally occurring in Earth's crust at any given time.

Name

Promethium

Owner

0x21bcA401c280c8492a1Ca15D554382EeCB92F2f3

ID#54592082…420673

Rarity

N/A