Atoms contain protons, neutrons and electrons. The electrons are arranged in shells around the nucleus. The periodic table The periodic table is a chart of all the elements arranged in increasing ...

The atomic distortion referred to here is that modification of a doubly occupied Hartree–Fock wave function required to represent instantaneous electron correlation effects.

I was looking at the periodic table of the elements the other day, as one does, when my eye fell upon the right-hand side of the chart. Right next to the noble gases at the extreme edge of the table ...