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Chapter 6: Q63E (page 337)

Question:Thallium was used as a poison in the Agatha Christie mystery story 鈥淭he Pale Horse.鈥� Thallium has twopossible cationic forms, +1 and +3. The +1 compounds are the more stable. Write the electron structure of the +1cation of thallium.

Short Answer

Expert verified

Tl1+= 1s22s22p63s23p64s23d104p65s24d105p66s25d10

Step by step solution

01

analyzing the given data

The data given to us is that thallium has two cationic forms, +1 and +3, the former being more stable. We need to find the electron configuration of this stable cation of thallium.

02

writing the electron configuration of +1 cation of thallium  

Observing from the periodic table, the configuration of original form of thallium is,

Tl = 1s22s22p63s23p64s23d104p65s24d105p66s25d106p1

Since, cation has a charge of +1, hence, the configuration of Tl1+ will be,

Tl1+= 1s22s22p63s23p64s23d104p65s24d105p66s25d10

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