promethium
Pm
61
atomic number
61
chemical element of
chemistry
random
copper
Cu
29
symbol
Pm
tags
chemical element
Wikidata
https://www.wikidata.org/wiki/Q1809
Wikimedia
https://commons.wikimedia.org/wiki/Category:Promethium
Wikipedia
https://en.wikipedia.org/wiki/Promethium
➡️
samarium
Sm
62
⬅️
neodymium
Nd
60