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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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What is the geometric sanctum of the ammonia molecule? How many pairs of electrons surround the nitrogen atom in NH 3 ? What is the approximate H N H bond angle in ammonia?

Interpretation Introduction

Interpretation:

The geometric structure of the ammonia molecule is to be stated. The number of pairs of electrons surrounding the nitrogen atom in ammonia and approximate HNH bond angle in ammonia molecule are to be stated.

Concept Introduction:

The representation of an element along with its valence electrons is referred to as Lewis symbol or Electron Dot Symbol. The Lewis structure exhibits the connection between atoms. Each dot around an atom represents electrons.

The geometry of molecule is determined by electron pair present around the central atom.

The formula to calculate electron pairs in compound is,

Electronpair=bondpair+lonepair

If electron pairs are 2 then the shape of molecule will be linear.

Similarly, if electron pairs are 3, then the shape of molecule will be trigonal planar.

Explanation

The geometric structure of the ammonia molecule is shown below.

Figure 1

The above structure exhibits that ammonia has tetrahedral geometry due to the presence of three bond pairs and one lone pair. In the molecular geometry of the compounds, lone pairs of electrons are not considered. Thus, the molecular geometry of NH3 is trigonal pyramidal. The electronic configuration of nitrogen atom is 1s22s22p3. It indicates that there are five electrons in the valence shell of nitrogen

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