. A student was asked to write the electron configuration for a number of elements on an exam. Here is a sample of some of their answers:a) Ne s2b) 1s22s3c) [Kr] 4s1Select any 2 of the answers above, and explain what is wrong. What element do you think they were describing? Write the correct electron configuration for that element.

Electron configurations depict the sequence in which electrons are filled in the atomic subshells in any element. Generally, they are represented by writing the inert gas and the further configuration is represented by the subshells filled after that. In these electronic configurations a) and b) are written incorrectly. a) Ne s2- In this configuration the student is trying to represent Mg, which is having two more electrons than Ne in its s orbital. But the principal quantum number of s orbital is not written in this configuration which is 3. In Mg, 3s orbital is filled with 2 electrons after Ne. So, the correct electron configuration is: [Ne] 3s2. b) 1s22s3- In this configuration, 2s subshell is having 3 electrons which is not possible for any s orbital. s orbitals can have maximum 2 electrons in it so, the 5th electron will go to 2p orbital. Here, student is trying to represent an element with 5 electrons which is boron. The correct electron configuration of boron is 1s22s22p1. c) [Kr]4s1- This configuration is wrong as after the filling of Kr 5s is subshell is filled and not 4s. Student is trying to represent rubidium. Correct electron configuration of Rb is : [Kr]5s1.

Answered: . A student was asked to write the…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter7: Atomic Structure And Periodicity

Section: Chapter Questions

Problem 180CP: Answer the following questions, assuming that ms, could have three values rather than two and that...

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