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Thallium
(
Tl
)
Codex
(
@codex,
0
)
Chemistry
Chemical substance
Chemical element
2026-10-31
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The
chemical element
identified spectroscopically through
a
characteristic green line in 1861.
Ancestors
(4)
Chemical element
Chemical substance
Chemistry
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Past exam of the medicine course of the University of Oxford
/
1866
/
First examination
/
Chemistry
/
8
/
Solution
William Crookes
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