Anthem Blue Cross and Blue Shield is the trade name of: In Indiana: Anthem Insurance Companies, Inc. In Kentucky: Anthem Health Plans of Kentucky, Inc. In Missouri (excluding 30 counties in the Kansas City area): RightCHOICEÂ®. Managed Care, Inc. (RIT), Healthy AllianceÂ® Life Insurance Company (HALIC), and HMO Missouri, Inc. RIT and certain.
The most stable isotope of astatine is At-210, which has a half-life of about 8.1 hours. This isotope's primary decay mode is positron emission to the relatively long-lived alpha emitter, polonium-210. In total, only five isotopes of astatine have half-lives exceeding one hour: those between 207 and 211.
Several naturally occurring metals such as francium, polonium, and astatine are also radioactive and ultra-rare. Youâll frequently read that the total astatine supply in the earthâs crust at any given moment is about an ounce.o the left you see a logarithmic graph comparing the physical abundances, by weight in the earthâs crust, of what many would recognize to be the seven most precious or ânobleâ metals. Ir, Rh, Re, Au, Pd, Pt, and Ag stand for iridium, rhodium, rhenium, gold, palladium, platinum, and silver respectively.