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{{Element | name=Thallium | symbol=Tl | anumber=81 | amass=204.3833 amu | state=Solid | class=Metals | cstructure=Hexagonal | color=Silvery-White | date=1861 | discname=Sir William Crookes | origname=From the Greek ''thallos'', meaning a young shoot or green twig, due to the bright green line in its spectrum. | uses=Originally, its compounds were used in rat and ant poisons, but has been prohibited since 1975 in many countries. Also used for detecting infrared radiation and in heart muscle research. | obtained=It is generally obtained as the by-product of [[zinc]] and [[lead]] smelting. Also found in [[iron pyrites]], [[crookesite]], [[hutchinsonite]] and [[lorandite]].}}
{{Element | name=Thallium | symbol=Tl | anumber=81 | amass=204.3833 amu | state=Solid | class=Metals | cstructure=Hexagonal | color=Silvery-White | date=1861 | discname=Sir William Crookes | origname=From the Greek ''thallos'', meaning a young shoot or green twig, due to the bright green line in its spectrum. | uses=Originally, its compounds were used in rat and ant poisons, but has been prohibited since 1975 in many countries. Also used for detecting infrared radiation and in heart muscle research. | obtained=It is generally obtained as the by-product of [[zinc]] and [[lead]] smelting. Also found in [[iron pyrites]], [[crookesite]], [[hutchinsonite]] and [[lorandite]].}}
'''Thallium''' is a soft poisonous [[metal]]lic element. Its physical properties are similar to those of [[lead]].<ref>https://www.merriam-webster.com/dictionary/thallium</ref>
==References==
{{reflist}}
[[Category:Elements]]
[[Category:Elements]]
[[Category:Metals]]
[[Category:Metals]]
{{Periodic table}}
{{Periodic table}}