thallium
Tl
81
atomic number
81
chemical element of
chemistry
random
open cluster
symbol
Tl
tags
chemical element
Wikidata
https://www.wikidata.org/wiki/Q932
Wikimedia
https://commons.wikimedia.org/wiki/Category:Thallium
Wikipedia
https://en.wikipedia.org/wiki/Thallium
➡️
lead
Pb
82
⬅️
mercury (element)
Hg
80