As a result, the company officially opened the mine on 27 March 2013 while simultaneously handing over new houses to 246 families who were relocated from Segorong to Praktiseer and Pidima, also in Burgersfort. The opening of the mine and the completion of the houses has been a long and arduous 12-year journey but finally both the community of Segorong and Imerys South Africa have a good reason to celebrate, says Imerys CEO and chairperson Gilles Michel.
Polonium is a radioactive element discovered in 1898 by scientists Marie and Pierre Curie and named for Marieâs native country, Poland. One of the Earthâs rarest elements, itâs an odorless, silvery-gray soft metal that can be ground into powder.
An element's atomic number indicates the number of protons it has in the nucleus. In this case, since polonium's atomic number is 84, it has 84 protons. In a neutral atom, t â¦ he number of protons is the same as electrons. This is because the positive charge of the protons in the nucleus must be balanced with by the negative charge of the electrons.