WebMar 1, 2024 · Thallium (Tl), chemical element, metal of main Group 13 (IIIa, or boron group) of the periodic table, poisonous and of limited commercial value. Like lead, thallium is a soft, low-melting element of low tensile strength. Freshly cut thallium has a metallic lustre that dulls to bluish gray upon.
WebNov 24, 2022 · TL;DR (also sometimes seen without the semicolon as TLDR) means “too long; didn’t read.” It’s an abbreviation that you’ll frequently find at the end of internet communications, usually ones...
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Thallium - Element information, properties and uses | Periodic Table
Web5 days ago · Tl. Definitions of Tl. noun. a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores. synonyms: atomic number 81, thallium. see more.
WebTeralitre (Tl or TL), a metric unit of volume or capacity. Thallium, symbol Tl, a chemical element. Thermoluminescence dating, in geochronology. Total length in fish measurement. Transmission loss (TL), in acoustics, electronics, optics, and related fields.