Octnilpentium (Onp)
Octnilpentium is the systematic name of the theoretical 805वाँ element in the periodic table with a symbol of Onp and atomic number of 805. Octnilpentium, also known as element 805, has आठ सौ पाँच protons in its nucleus, and आठ सौ पाँच electrons in its shells.