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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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Which of the following statements is false concerning bonding?

Elements with extremely different electronegativities tend to form ionic bonds with each other.

In an N—O bond. electron density is greater near the O atom.

An N—O bond is an example of a polar covalent band.

In general, chemical bonds form to minimize energy.

The bond in KBr is formed by sharing electrons.

Interpretation Introduction

Interpretation:

The false statement regarding bonding is to be identified.

Concept Introduction:

A chemical bond is formed due to the attraction between the atoms that lead to the formation of a compound or a molecule.

The chemical bond that exists between two atoms in which electrons are distributed in an unequal amount is known as a polar bond.

The bonding is formed by the complete transfer of the electrons between the atoms to achieve the stable electronic configuration is known as ionic bonding.

The bonding is formed by the sharing of the electrons between the atoms to achieve the stable electronic configuration is known as covalent bonding.

Explanation

Reason for false statements:

e. It is false that the bond in KBr is formed by sharing electrons because the bond in KBr is an ionic bond.

e. The bond in KBr is formed by the complete transfer of electrons not by the sharing of electron to achieve the stable electron configuration. There exists a huge electronegativity difference in the electronegativity values of K and Br.

The electronegativity value of potassium is 0.8.

The electronegativity value of bromine is 2.8.

The difference in the electronegativity values for KBr bond is,

Differenceinelectronegativity for KBr bond=2.80.8=2.0

The difference in the electronegativity values for KBr bond is 2.0.

Thus, the bond formed in KBr is an ionic bond not the covalent bond.

Reason for true statements: a. It is true that elements with extremely different electronegativities tend to form ionic bonds with each other because the electronegativity difference for forming an ionic bond is always equal to or greater than 2.0.

b. It is true that in an NO bond, electron density is greater near the O atom because oxygen is more electronegative than nitrogen.

c. It is true that the NO bond is an example of a polar covalent bond because NO bond possesses small electronegativity difference

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