thallium (Tl)
Biology

thallium (Tl)



Term: thallium (Tl)
Literally meaning: ?pertaining to green young shoot ?
Origin:
Origin: Anc Greek
??????/thallos(=young shoot, green branch, twig) > ?????/threpho(=feed)
The element named because of  the bright green line in its spectrum
Coined/History
The element was found and named by Sir William Crookes (1832-1919) and independently by Claude-Auguste Lamy in 1861.  Thallium used to poison rodents but nowadays it is prohibited.  
Sources
William Crookes, On the Existence of a New Element, probably of the Sulphur Group, The Chemical News, vol III, No 69, March 30, 1861
John Emsley, The Trouble with Thallium, New Scientist, vol 79 No 1115, 10 August 1978, p 392.

Definition
Thallium is a chemical element with atomic number 81 and atomic mass 204.3833.  Its oxide is used to make glass that has a high index of refraction.  




- Thulium (tm)
Term: thulium (Tm)Literally meaning: ?pertaining to Thoule land?Origin According Greek explorer Pytheas of Massalia (4 t6h cen BC)  Thoulewas the northernmost habitable region of the world. Pytheas about 330 BC was travelled to England and then...

- Titanium (ti)
Term: titaniumLiterally meaning: ?pertaining to Titans?Origin: Anc Greek?????/Titan(= in Greek Mythology Titans and their sisters Titanesses were giant and strong primordial dieities children of Gaia (Earth) and Uranus (sky). Titans were...

- Chlorine (cl)
Term: chlorine (Cl)Literally meaning: ??Origin: Anc Greek??????/cloros(=green-yellow)Coined/History  Although sodium cloride was known since ancient times it was not until in 1630  when Belgian physician Jan Baptist van Helmont obtained...

- Lithium (li)
Term: lithium (Li)Literally meaning: ?pertaining to stone?Origin: Anc Greek?????/lithos(=stone, rock)Coined/History  The element was named in 1817 by Sweeden chemist Johan August Arfvedsen (1792-01-12)  when analysing petalite  (LiAlSi4O10)...

- Helium (he)
Term: heliumLiterally meaning: ?pertaining to sun?Origin: Anc Greek?ç???? (or according Homer ???????/yelios)/helios (=sun)  of unknown etymology  probably from ?ç///(certainly, indeed, always) and verb ????/elao(=move)  >?????????/elefsomai(=go...



Biology








.