Element Bismuth, Bi, Poor Metal. For the purposes of analysis, bismuth. Bismuth readily forms alloys with other metals whereby, in accordance with the general law, the melting point sinks. The combining weight of bismuth has been determined by weighing the metal and the oxide obtained from it. It is not known with perfect certainty, and we shall take it as Bi.

Element Lead, Pb, Poor Metal. Calcium, which exhibits relations of isomorphism in both directions, stands in the middle. On the other hand, lead is decidedly a heavy metal, and forms an insoluble, dark-coloured sulphur compound. The combining weight of lead has been determined by the conversion of the metal into the oxide, and vice versa. It has been found to be Pb. Greeks called it molybdos; the same n.

Element Polonium, Po, Metalloid. 7 natural metalloid polonium isotopes. With mass numbers 210-212, 214-216 and 218 are found as members of radioactive decay series of uranium, actinouranium and thorium. Is a rare element; its crustal abundance is 2x10. Is a soft metal with silver luster, density 9. Outer electron shell configuration is 6 s. As well as hydroxide PoO.

The element 116, Ununhexium. Is a temporary IUPAC systematic chemical element name for element 116. This name will be changes in future. Another name used for the element 116 is eka-polonium.

The element 114, Ununquadium. Was discovered and reported December 1998 - January 1999 by scientists from the Joint Institute for Nuclear Research, Dubna, Russia with materials from scientists at the Lawrence Livermore National Laboratory, USA. In 2004 Ununquadium was synthesized by another pathway the Joint Institute for Nuclear Research, Dubna, Russia. Due to predicted similarities between Ununquadium.