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.
Barack Hussein Obama II (US /bÉËrÉËk huËËseÉªn ÉµËbÉËmÉ/ ; born August 4, 1961) is the 44th and current President of the United States, and the first African American to hold the office.opularly dubbed the Cuban Thaw, The New Republic deemed the Cuban Thaw to be Obama's finest foreign policy achievement.. On July 1, 2015, President Barack Obama announced that formal diplomatic relations between Cuba and the United States would resume, and embassies would be opened in Washington and Havana.