Octpenttrium (Opt)
Octpenttrium is the systematic name of the theoretical 853. element in the periodic table with a symbol of Opt and atomic number of 853. Octpenttrium, also known as element 853, has οκτακόσια πενήντα τρία protons in its nucleus, and οκτακόσια πενήντα τρία electrons in its shells.