Penthextrium (Pht)
Penthextrium is the systematic name of the theoretical 563. element in the periodic table with a symbol of Pht and atomic number of 563. Penthextrium, also known as element 563, has penki šimtai šešiasdešimt trys protons in its nucleus, and penki šimtai šešiasdešimt trys electrons in its shells.