How to write correct electron configuration for d group metals?- Inorganic Chemistry Exam Question

In this video, I started with the exam question:
What is the electron configuration of Tc, Tc^4 and Tc^2+.

This is a 2021 Inorganic Chemistry I exam question. This question might be confusing for students if you know Zeff calculation. However, Zeff nuclear charge calculation does not explain the electron configuration. I mentioned Aufbau principle and electron confiuration of d group elements. However, there are exceptions for the electron configuration, therefore, D group elements' electron configuration might be an issue for the students and some annoying instructors can ask it in inorganic chemistry exams like I encountered. You have to know the exceptions (Au, Pd, Ag, Cr, Pt, Nb, Mo, Ru, Cu) to make the questions correct. In the video, I mentioned the easy way to memorize the correct electron configuration for the elements that does not follow the rules. By the way, after the exam, you can forget this information and continue to live without any stress.

Arca ANIL

#chemistry #inorganicchemistry #chemistrylecture #exampreparation #science #chemistry101

Timecodes:

0:00 - Exam Question
01:02 - Aufbau Principle
01:32 - Zeff Calculation
2:42 - Rules for correct d electron configuration and exceptions
5.04 - Electron configurations of all d group elements
9:45 - Solution of the exam question
11:14 - Summary for the electron configuration for d group elements