Brush the dust off your periodic tables. (I understand some of you may have destroyed or mutilated them because of the love/hate nature of chemistry.) The series is not meant to be difficult but fun and educational.
Beware of Muggles. Please tighten and return the Nano to the exact location and save space by only initialling the log.
Additional Information:
It is a hard, brittle, radioactive silvery metal. It does not occur in nature and must be made in a nuclear reactor by neutron capture reactions from plutonium and americium isotopes. It tarnishes slowly in dry air at room temperature. It was first produced in 1944 at the University of California, Berkeley in the USA in a cyclotron by bombarding plutonium-239 (239Pu) with α-particles. It was isolated in visible quantities as the hydroxide in 1947.
Most compounds are faintly yellow. If it enters the body it accumulates in the bones, and is therefore very toxic as its radiation destroys the red-cell forming mechanism. The most stable isotope has a half-life of 16 million years. It is probably present in uranium ores. It has a few specialised uses but only a few of its compounds are known.
It was identified by Seaborg and others in 1944 as a result of helium ion bombardment of the plutonium isotope 239Pu. Three years later visible amounts of the hydroxide were isolated by Werner and Perlman. In 1951, the same workers prepared its elemental form for the first time.