ABSTRACT
Extending atomic theory to atoms more complex than hydrogen is simple in principle. Consider a model of the helium atom, two electrons in the field of a nucleus of charge +2e(Fig. 7.1). Model of the helium atom with two electrons in the field of a nucleus (sizes of electrons and nucleus much exaggerated). https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315137896/bf7eefdc-c787-4fb5-8085-e00c187588af/content/fig7_1.tif"/>
