Draft:Andrey Kulsha

Andrey Kulsha is a Belarusian chemist who works on the periodic table. Kulsha works on extending the periodic table so that more elements can be added. Kulsha's studies on the table proceeded to extending the table itself. Elements after 118, Oganesson, were starting to be researched. Based on the

elements' likely chemical properties, elements 157–172 are placed as eighth-period congeners of yttrium through xenon in the fifth period; this accords with the 2006 calculations of Nefedov et al. In Kulsha's first suggestion (2011, after Pyykkö's paper was published), elements 121–138 and 139–156 are placed as two separate rows (together called "ultransition elements"), related by the addition of a 5g18 subshell into the core, as they respectively mimic lanthanides and actinides. In his second suggestion (2016), elements 121–142 form a g-block (as they have 5g activity), while elements 143–156 form an f-block placed under actinium through nobelium. These were the suggestions for the periodic table he had: