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Thallium
/ˈθæliəm/
A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
📖 Definitions of "Thallium"
noun
- 1
A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
- 2
A single atom of this element.
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