A study from Chalmers University of Technology, Sweden, has yielded new answers to fundamental questions about the relationship between the size of an atom and its other properties, such as electronegativity and energy. The results pave the way for advances in future material development. For the first time, it is possible under certain conditions to devise exact equations for such relationships.
source https://phys.org/news/2021-03-size-atomic-properties.html