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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 main idea in the valence shell electron pair repulsion (VSEPR) theory?

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Interpretation Introduction

Interpretation:

The main idea in the valence shell electron pair repulsion theory is to be stated.

Concept Introduction:

The VSEPR model is based on an important assumption according to which, “In a molecule, the surrounding atoms and electrons should be arranged in way that the central atom should feel minimum repulsion from all of them”. The shape in VSEPR model gives specific angles for the corresponding shape.

Explanation

VSEPR-theory is an important model that is frequently used in chemistry to decide the shape and geometry of the molecules. In terms of electron density it is given that both the bonding electrons as well as lone pair of electrons holds the shape of the molecule.

The above given assumption leads to the following results which help to predict the shape of a molecule. These results are given as,

  • The diatomic molecule always results in a linear shape.
  • The molecule with three or more atoms always has a central atom to which rest of the atoms is linked.
  • If the linked atoms are exactly the same and the central atom is surrounded by the bond pairs of electrons only, then the molecule results in the symmetrical shape and the molecule would have a regular geometry.
  • If the linked atoms are not the same and the central atom is surrounded by both the lone pairs as well as the bond pairs, then the central atom feels different repulsions and results in irregular or distorted geometry...

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