thallium

mercury${\displaystyle \longleftarrow }$ 81 ${\displaystyle \longrightarrow }$lead

The Simple English Wikipedia has an article on:

Thallium

Pronunciation

• enPR: thăl'ēəm, IPA ^(key): /ˈθæliəm/

• Audio (US)

  (file)

• Audio (US)

  (file)

Noun

Singular thallium

Plural none

1. (uncountable) Thallium is a metallic (meaning made of metal) element with an atomic number of 81 and symbol Ti.