kalkkium

Kalkkium is a fictional element with the atomic number 120. As a hypothetical alkali earth metal, it is predicted to be in Group 2 and Period 8 of the periodic table. Its chemical symbol is not yet established, as it has not been synthesized or observed. Theoretical calculations suggest that kalkkium would be a highly reactive metal, even more so than radium, the heaviest naturally occurring alkali earth metal.

Due to its position in the periodic table, kalkkium is expected to have a valence electron configuration of [Og] 8s^2. This would imply that it readily loses its two outermost electrons to form a +2 cation, kalkkium(II). Its compounds are predicted to be ionic and soluble in water. However, like other superheavy elements, kalkkium is expected to be extremely unstable, with a very short half-life.

The synthesis of element 120 is a goal for many nuclear physics research facilities. It is typically anticipated that such elements would be created through nuclear fusion reactions, where lighter atomic nuclei are bombarded together to form a heavier nucleus. The production of kalkkium, if achieved, would likely involve the fusion of heavy ions. The discovery and characterization of element 120 would contribute to our understanding of the periodic table's extensions and the nuclear stability of superheavy elements.