Agoura Hills. Country Oaks is located in Oak Park which is less than 15 minutes from the Santa Monica Mountains and 20 minutes from Malibu beaches. Country Oaks is also located in the award winning Oak Park Unified School District, which is rated in the top 10 school districts of California.
Polonium is a radioactive element that exists in two metallic allotropes. The alpha form is the only known example of a simple cubic crystal structure in a single atom basis, with an edge length of 335.2 picometers; the beta form is rhombohedral.olonium is a very rare element in nature because of the short half-life of all its isotopes. 210 Po, 214 Po, and 218 Po appear in the decay chain of 238U; thus polonium can be found in uranium ores at about 0.1 mg per metric ton (1 part in 10 10), which is approximately 0.2% of the abundance of radium.
Accessibility Information and Accesskeys | Skip navigation. Polonium 210 (Po-210) has been identified as the likely source of 'radiation poison' which may have lead to the death of Alexander Litvinenko.The BBC is currently running a story on this event.olonium 210 (Po-210) is an alpha emitter (a type of ionising radiation) with a half life of about 140 days (meaning its activity will reduce by half every 140 days).