61
Pm
145Promethium
Appearancemetallic
Categorylanthanide
Discovered byChien Shiung Wu
Named byIsotopes of promethium
What element is Pm on the periodic table?Pm is the element Promethium on the periodic table.
What is the symbol for Promethium on the periodic table?The symbol for Promethium on the periodic table is Pm.
What does Promethium look like?To the human eye, Promethium is metallic.
About PromethiumPromethium is a chemical element; it has 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 the Earth's crust at any given time. Promethium is one of only two radioactive elements that are both preceded and succeeded in the periodic table by elements with stable forms, the other being technetium. Chemically, promethium is a lanthanide. Promethium shows only one stable oxidation state of +3.Source: Wikipedia