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Answer: Periodic Table; Effective Nuclear Charge

Chemistry: The Central Science | 12th Edition | ISBN: 9780321696724 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward ISBN: 9780321696724 27

Solution for problem 14E Chapter 7

Chemistry: The Central Science | 12th Edition

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Chemistry: The Central Science | 12th Edition | ISBN: 9780321696724 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward

Chemistry: The Central Science | 12th Edition

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Problem 14E

Problem 14E

Periodic Table; Effective Nuclear Charge (Sections)

Detailed calculations show that the value of Zeff for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Zeffusing Slater’s rules? (c) Which approach gives a more accurate estimate of Zeff? (d) Which method of approximation more accurately accounts for the steady increase in Zeff that occurs upon moving left to right across a period? (e) Predict Zeff for a valence electron in P, phosphorus, based on the calculations for Si and Cl.

Step-by-Step Solution:

Problem 14E

Periodic Table; Effective Nuclear Charge (Sections)

Detailed calculations show that the value of Zeff for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Zeffusing Slater’s rules? (c) Which approach gives a more accurate estimate of Zeff? (d) Which method of approximation more accurately accounts for the steady increase in Zeff that occurs upon moving left to right across a period? (e) Predict Zeff for a valence electron in P, phosphorus, based on the calculations for Si and Cl.

     

                                                               Step by Step Solution

Step 1 of 5

a)

Given that  for the outermost electrons in Si and Cl atoms obtained from detailed

calculations are 4.29+ and 6. 12+.

We are asked to calculate experience by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant

The electron configuration of

There are 10 core electrons and four valence electrons for Si

Screening constant

=10.00

Effective nuclear charge:

            = 14 - 10.00

            = 4

The electron configuration of

There are 10 core electrons and 7 valence electrons for Cl.

Screening constant

                                                             

                                                                     =10.00

Effective nuclear charge:

                                                   

                                                              = 17 - 10.00

                                                             = 7



Step 2 of 5

Chapter 7, Problem 14E is Solved
Step 3 of 5

Textbook: Chemistry: The Central Science
Edition: 12
Author: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward
ISBN: 9780321696724

Since the solution to 14E from 7 chapter was answered, more than 1466 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 14E from chapter: 7 was answered by , our top Chemistry solution expert on 04/03/17, 07:58AM. This full solution covers the following key subjects: Zeff, estimate, electrons, Calculations, outermost. This expansive textbook survival guide covers 49 chapters, and 5471 solutions. Chemistry: The Central Science was written by and is associated to the ISBN: 9780321696724. The answer to “Periodic Table; Effective Nuclear Charge (Sections)Detailed calculations show that the value of Zeff for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Zeffusing Slater’s rules? (c) Which approach gives a more accurate estimate of Zeff? (d) Which method of approximation more accurately accounts for the steady increase in Zeff that occurs upon moving left to right across a period? (e) Predict Zeff for a valence electron in P, phosphorus, based on the calculations for Si and Cl.” is broken down into a number of easy to follow steps, and 122 words. This textbook survival guide was created for the textbook: Chemistry: The Central Science, edition: 12.

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Answer: Periodic Table; Effective Nuclear Charge