Preparing for your ACS examination in general chemistry
Preparing for your ACS examination in general chemistry
98th Edition
ISBN: 9780970804204
Author: Lucy T Eubanks
Publisher: ACS DIVCHED EXAMINATIONS INST.
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Chapter AS, Problem 18PQ
Interpretation Introduction

Interpretation:

The electronic configuration that is impossible has to be determined.

Concept Introduction:

To write electronic configuration certain rules have to be followed such as Hund rule, Pauli Exclusion principle and Aufbau rule.

If Z is the atomic number then the electrons that are filled into the orbitals are Z. Electrons are generally filled in order of increasing energy. In an atom, 2 electrons can never have same group of 4 quantum numbers and this is Pauli Exclusion Principle.

When orbitals are degenerate then each orbital is first filled with 1 electron each before the second electron enters an orbital and this is Hund’s rules.

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