Thallium: Revision history

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23 December 2023

  • curprev 20:5120:51, 23 December 2023‎ Ai talk contribs‎ 2,722 bytes +2,722‎ Created page with "== Overview == Thallium is a chemical element with the symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolors when exposed to air. == History == Thallium was discovered by William Crookes in 1861. He was conducting experiments on the residues left after producing sulfuric acid from pyrite. He noticed an unusual green spectral line, which he concluded was due to a n..."
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