Thallium Electron Configuration:Everything You Need to Know!

The chemical element thallium, or Tl, is a transition element. Let us talk about some more pertinent details about this element.

The electronic configuration of thallium is Xe⁵⁴ 4f¹⁴ 5d¹⁰ 6p¹ which has the atomic number 81. It looks silvery white and weighs 204 g/mol in terms of its atomic composition. It is a member of group 13 in the periodic table. It has a metallic sheen that tarnishes when exposed to air.

The element’s electronic configuration, orbital diagram, electronic configuration notation, and a number of other topics are covered in more detail in this article.

How to write thallium electron configuration

Tl contains 81 electrons. The following rules must be followed in order to write the configuration of any element.

• Aufbau’s Principle, states that electrons fill up in order of increasing energy
• Pauli’s Exclusion Principle states that each orbital can only hold a maximum of two electrons.
• According to Hund’s Rule, both electrons must have an opposite spin.

Thallium electron configuration diagram

On the basis of the following diagram, the electronic configuration of Tl can be explained. They are arranged in the increasing order of their energies.

Thallium electron configuration notation

The electronic configuration notation of Tl is Xe⁵⁴ 4f¹⁴ 5d¹⁰ 6s² 6p¹

Thallium unabbreviated electron configuration

The unabbreviated electronic configuration of Tl is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰  6p¹.

Ground state thallium electron configuration

The ground state Tl electronic configuration is 1s² 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p¹.

Excited state of thallium electron configuration

The excited state thallium electronic configuration is Xe⁵⁴ 4f¹⁴ 5d¹⁰ 6s² 6p⁰ .

Ground state thallium orbital diagram

Thallium 1+ electron configuration

The electronic configuration of Tl¹⁺ : Xe⁵⁴ 4f¹⁴ 5d¹⁰ 6s² 6p⁰ .

Thallium 3+ electron configuration

The electronic configuration of Tl³⁺ : Xe⁵⁴ 4f¹⁴ 5d¹⁰ .

Condensed electron configuration of thallium

The condensed electronic configuration of Tl : Xe⁵⁴ 4f¹⁴ 5d¹⁰ 6s² 6p¹ .

Conclusion

Nuclear radiography was primarily derived from the radioactive isotope Tl²⁰¹ prior to the widespread use of technetium. However, thallium and its compounds are extremely toxic.

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