1. Chemical physical and spectroscopic data all suggest a periodic
table as shown on p. (/).
2. The maximum number of electrons which a given quantum
level can accommodate is given by the formula 2n2 where n is the
quantum level number.
3. Except for the n = 1 quantum level the maximum number of
electrons in the outermost quantum level of any period is always eight.
At this point the element concerned is one of the noble gases (Chapter
12).