Pentpenthexium (Pph)
Pentpenthexium is the systematic name of the theoretical 556. element in the periodic table with a symbol of Pph and atomic number of 556. Pentpenthexium, also known as element 556, has penki šimtai penkiasdešimt šeši protons in its nucleus, and penki šimtai penkiasdešimt šeši electrons in its shells.