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Thallium: properties of free atoms. Thallium atoms have 81 electrons and the shell structure is 2.8.18.32.18.3. The ground state electron configuration of ground state gaseous neutral thallium is [ Xe ]. 4f 14. 5d 10. 6s 2. 6p 1 and the term symbol is 2 P 1/2.hallium atoms have 81 electrons and the shell structure is 2.8.18.32.18.3.
Comprehensive data on the chemical element Thallium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Thallium.Common chemical compounds are also provided for many elements.omprehensive data on the chemical element Thallium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Thallium.