Bismuth has long been considered as the element with the highest atomic mass that is stable. However, in 2003 it was discovered to be weakly radioactive: its only primordial isotope, bismuth-209, decays via alpha decay with a half life more than a billion times the estimated age of the universe.lemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. The free element is 86% as dense as lead. It is a brittle metal with a silvery white color when freshly produced, but is often seen in air with a pink tinge owing to surface oxidation.
President Obama is lifting some restrictions on Cuban Americans' contact with Cuba and allowing U.S. telecom companies to operate there, opening up the communist island nation to more cellular and satellite service, White House press secretary Robert Gibbs announced at his regular news briefing today.
More ways to share... If the Obama administration has its way, commercial flights between Havana and the U.S. will be underway by December via a tack to sidestep the decades-old travel ban requiring congressional approval, The Wall Street Journal reports. Barack Obama, travel, embargo, cuba, airlines. 495. Tuesday, 18 Aug 2015 11:10 AM.