Term: thallium (Tl)
Literally meaning: “pertaining to green young shoot ”
Origin:
Origin: Anc Greek
θαλλός/thallos(=young shoot, green branch, twig) > θρέφω/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.
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