Millium

Millium (also known as Unnilnilnilium or EK (short for element 1000)) is the chemical element with an atomic number of 1000. It is in the K-block of chemical elements. It has a variable atomic mass, often in excess of 2000. It is classed as a supervirgal element.

Millium is only possible to create using Ligism.

Millium is of no particular chemical significance, it is more significant due to the milestone it's enormous atom represents.

Chemical properties
Millium has 1000 protons and 1000 electrons in it's atomic nucleus. The atomic mass is variable, often around 2500 (with 1500 neutrons). However, using Ligism, it is possible to create a millium atom with zero neutrons, allowing for an atomic mass of close to 1000.

The electrons of millium fill 17 energy levels, and occupy S, P, D, F, G, H, I, J and K orbitals. It fills 22 of the 34 electrons in the K-17 orbital.

Virgism is used to alter the behavior of the innermost electrons, which travel at relativistic speeds.