In this model, each electron energy level is denoted by numbers that take concentric shells as suggested by the Bohr model because there are overlaps in the ordering of the energy levels.

• 在这个模型里，单个电子能量水平通过获得的同圆心外壳的数量来表示，如波尔模型提出的那样，因为在能量水平面排列存在重叠。