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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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hat is the total number of valence electrons in each of the following molecules?

msp;  a .  HNO 3                               C .  H 3 PO 4 b .  H 2 SO 4                             d .  HClO 4

Interpretation Introduction

(a)

Interpretation:

The total number of valence electrons in the given molecule is to be stated.

Concept Introduction:

Principal energy levels contain orbitals in which electrons are present. The electrons present in outermost principal energy levels take part in the chemical reactions. They are referred to as valence electrons. The electrons other than valence electrons are referred to as core electrons.

Explanation

The given molecule is HNO3. The number of valence electrons in H, N and O is 1, 5 and 6 respectively.

The total number of valence electrons in HNO3 is calculated as shown below.

Totalvalenceelectrons=nValenceelectronsinH+nValenceelectronsinN+nValenceelectronsinO

Where,

  • n is the number of atoms.

Substitute the values of n, valence electrons of H, N and O in the above expression

Interpretation Introduction

(b)

Interpretation:

The total number of valence electrons in the given molecule is to be stated.

Concept Introduction:

Principal energy levels contain orbitals in which electrons are present. The electrons present in outermost principal energy levels take part in the chemical reactions. They are referred to as valence electrons. The electrons other than valence electrons are referred to as core electrons.

Interpretation Introduction

(c)

Interpretation:

The total number of valence electrons in the given molecule is to be stated.

Concept Introduction:

Principal energy levels contain orbitals in which electrons are present. The electrons present in outermost principal energy levels take part in the chemical reactions. They are referred to as valence electrons. The electrons other than valence electrons are referred to as core electrons.

Interpretation Introduction

(d)

Interpretation:

The total number of valence electrons in the given molecule is to be stated.

Concept Introduction:

Principal energy levels contain orbitals in which electrons are present. The electrons present in outermost principal energy levels take part in the chemical reactions. They are referred to as valence electrons. The electrons other than valence electrons are referred to as core electrons.

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