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Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

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BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 4, Problem 109CWP
Textbook Problem
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Consider the molecular orbital electron configurations for N2, N2+, and N2. For each compound or ion, fill in the table below with the correct number of electrons in each molecular orbital.

MO N2 N2+ N2
σ2P*      
π2P*      
σ2P      
π2P      
σ2S*      
σ2S      

Interpretation Introduction

Interpretation: The correct values, corresponding to the different stated orbitals, for the given species are to be identified.

Concept introduction: The electronic configuration for multi-electron diatomic is written using the molecular orbitals, derived from the H2+ molecular ion.

To determine: The appropriate values with respect to the stated orbitals.

Explanation of Solution

The electronic configuration of the nitrogen atom is,

N=1s22s22p3

Nitrogen has five valence electrons.

The N2 molecule is made up of two nitrogen atoms. The total number of electrons present in N2 is 14 ( 7e in each nitrogen atom).

The molecular orbital diagram for the N2 molecule is,

Figure 1

The molecular orbital configuration of N2 is,

(σ1s)2(σ1s*)2(σ2s)2(σ2s*)2(π2px2=π2py2)(σ2pz)2

The N2+ is formed by the loss of an electron by the N2 molecule. Hence, its configuration is,

(σ1s)2(σ1s*)2(σ2s)2(σ2s*)2(π2px2=π2py2)(σ2pz)1

The N2 is formed by the gain of an electron by the N2 molecule

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Chapter 4 Solutions

Chemistry: An Atoms First Approach
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