Element Antimony, Sb, Metalloid. Is allied on the one hand to bismuth, and on the other, to arsenic and phosphorus. It therefore forms a transition element between the metals and the non-metals, but is still essentially on the side of the metals. Its combining weight is Sb. Probably, therefore, we are dealing with a mixture of different kinds of vapour, perhaps Sb. Is known from high antiquity. Oriental countries were familiar with Antimony.

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.

Element Tellurium, Te, Metalloid. While iodine is very similar to bromine, if not in external appearance, at least in the nature of the corresponding compounds, the differences between selenium and tellurium are more pronounced, so that it has repeatedly been regarded as doubtful whether these two elements ought to be regarded as members of the same family. The combining weight of tellurium, Te. Combines with the metals to form tellurides; these correspond to the sulphides.

Element Tin, Sn Stannum, Poor Metal. Has been used, since epochs of Homer and Moses. Alluvial aggradations are found much more often and may be processed much easier than other ores. Brythons were closely familiar with tin. As Cornwall slag hills testify.

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 115, Ununpentium. Is a temporary IUPAC systematic chemical element name for element 115. This name will be changes in future. Another temporary name for this element is eka-bismuth.

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.