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Thallium
My element was Thallium. It is atomic number 81. It has 81 protons and
electrons and 123 neutrons. Thallium has a mass of 204.3833 atomic mass units.
Its symbol is Tl. It resides in Group IIIA of the periodic table. That is the
aluminum family. Thallium has a bluish color after exposure to the air. It is
a very soft and malleable metal. It has an electron configuration of
1s22s23s23p64s23d104p65s24d105p64f145d106s26p1. It has 6 electron shells. It
melts at 576.7 K and boils at 1730 K. It is a solid when at room temperature.
Thallium was discovered in 1861 by a British chemist and physicist. His
name was Sir William Crookes. He discovered it spectroscopically in England.
He isolated it. In 1862, the French chemist Claude August again isolated it.
Thallium comes form the Greek word "thallos". "Thallos" meant "green twig" or
"green shoot".
Thallium does not have many uses. It is used in photocells because of
the electrical conductivity of thallium......
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Title: Thallium
Approximate Word Count: 460
Approximate Pages: 2 (250 words per double-spaced page)
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Thallium
Thallium. Thallium My element was Thallium. It is atomic number 81. ... Thallium
has a mass of 204.3833 atomic mass units. Its symbol is Tl. ... ... -
Thallium
Thallium. Thallium My element was Thallium. It is atomic number 81. ... Thallium
has a mass of 204.3833 atomic mass units. Its symbol is Tl. ... ... -
Cardiolite Vs. Myoview
... use more commonly more accessible chemical elements like Iodine and Flourine and
have a much longer half life Technology • For many years Thallium-201 was ... ... -
Polonium
... becoming ill. Before his death it was thought that thallium, or even radio
thallium, might have been the cause of his illness. At ... ... -
William Crookes
... Using his techniques Crookes discovered the element thallium, which won him election
to the Royal Society His efforts in determining the weight of thallium in ... ...
