This week's element is thallium, which goes by the symbol Tl and the atomic number, 81. Thallium was discovered in 1861 by spectroscopy and named by British chemist Sir William Crookes. Its name comes ...

The first sign that something was wrong was numbness in his feet. Then things got rapidly and severely worse. It was August 2012, and soon, a chemistry PhD student in the UK would be fighting for his ...

This test, which involves a small amount of a radioactive substance injected intravenously, measures the blood flow to your heart when you’re resting and active. A thallium stress test is an imaging ...

Thallium, the substance which has poisoned ex-KGB agent Alexander Litvinenko in London, is a highly-toxic heavy metal. Although it used to be commonly found in rat poisons and insecticides, since the ...

ST. CLOUD — The substance suspected of being used to kill a St. Cloud man earlier this year has a deadly legacy, tied to assassinations, mass poisonings and Cold War-era plots. Cody Ray Ernst, 33, of ...

DURING an investigation of the creep properties of a range of solid-solution alloys of thallium in lead, an interesting observation concerning their mode of deformation has been made. This concerns ...