EBK CHEMICAL PRINCIPLES
EBK CHEMICAL PRINCIPLES
8th Edition
ISBN: 9781305856745
Author: DECOSTE
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 2, Problem 43E

(a)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 1224Mg are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(a)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 1224Mg are 12,12 and 12 respectively.

Explanation of Solution

The element given is 1224Mg .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 1224Mg is 12 and mass number is equal to 24 . Atomic number is equivalent to number of protons, thus, number of proton is 12 .

Since it is a neutral species, therefore, number of electron is also equal to 12 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 1224Mg in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=2412=12

Therefore, the number of neutrons in 1224Mg is 12 .

(b)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 1224Mg2+ are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(b)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 1224Mg2+ are 12,12 and 10 respectively.

Explanation of Solution

The element given is 1224Mg2+ .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 1224Mg2+ is 12 and mass number is equal to 24 . Atomic number is equivalent to number of protons, thus, number of proton is 12 .

Since it has a charge of +2 , this means that two electrons are lost. Therefore, number of electron is also equal to 122 that is 10 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 1224Mg2+ in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=2412=12

Therefore, the number of neutrons in 1224Mg2+ is 12 .

(c)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 2759Co2+ are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(c)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 2759Co2+ are 27,32 and 25 respectively.

Explanation of Solution

The element given is 2759Co2+ .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 2759Co2+ is 27 and mass number is equal to 59 . Atomic number is equivalent to number of protons, thus, number of proton is 27 .

Since it has a charge of +2 , this means that two electrons are lost. Therefore, number of electron is also equal to 272 that is 25 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 2759Co2+ in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=5927=32

Therefore, the number of neutrons in 2759Co2+ is 32 .

(d)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 2759Co3+ are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(d)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 2759Co3+ are 27,32 and 24 respectively.

Explanation of Solution

The element given is 2759Co3+ .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 2759Co3+ is 27 and mass number is equal to 59 . Atomic number is equivalent to number of protons, thus, number of proton is 27 .

Since it has a charge of +3 , this means that three electrons are lost. Therefore, number of electron is also equal to 273 that is 24 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 2759Co3+ in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=5927=32

Therefore, the number of neutrons in 2759Co3+ is 32 .

(e)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 2759Co are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(e)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 2759Co are 27,32 and 27 respectively.

Explanation of Solution

The element given is 2759Co .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 2759Co is 27 and mass number is equal to 59 . Atomic number is equivalent to number of protons, thus, number of proton is 27 .

Since it is a neutral species, therefore, number of electron is also equal to 27 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 2759Co in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=5927=32

Therefore, the number of neutrons in 2759Co is 32 .

(f)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 3479Se are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(f)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 3479Se are 34,45 and 34 respectively.

Explanation of Solution

The element given is 3479Se .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 3479Se is 34 and mass number is equal to 79 . Atomic number is equivalent to number of protons, thus, number of proton is 34 .

Since it is a neutral species, therefore, number of electron is also equal to 34 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 3479Se in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=7934=45

Therefore, the number of neutrons in 3479Se is 45 .

(g)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 3479Se2 are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(g)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 3479Se2 are 34,45 and 36 respectively.

Explanation of Solution

The element given is 3479Se2 .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 3479Se2 is 34 and mass number is equal to 79 . Atomic number is equivalent to number of protons, thus, number of proton is 34 .

Since it has a charge of 2 , this means that two electrons are added. Therefore, number of electron is also equal to 34+2 that is 36 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 3479Se2 in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=7934=45

Therefore, the number of neutrons in 3479Se2 is 45 .

(h)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 2863Ni are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(h)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 2863Ni are 28,35 and 28 respectively.

Explanation of Solution

The element given is 2863Ni .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 2863Ni is 28 and mass number is equal to 63 . Atomic number is equivalent to number of protons, thus, number of proton is 28 .

Since it is a neutral species, therefore, number of electron is also equal to 28 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 2863Ni in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=6328=35

Therefore, the number of neutrons in 2863Ni is 35 .

(i)

Interpretation Introduction

Interpretation: The numbers of protons, neutrons and electrons present in 2863Ni2+ are to be stated.

Concept introduction: In a neutral atom, the number of electrons present are equal to protons. These two are also equivalent to the atomic number in case of neutral atoms. The number of neutrons is calculated by taking the difference in mass number and atomic number. This is because mass number is calculated by taking sum of number of protons and number of neutrons.

(i)

Expert Solution
Check Mark

Answer to Problem 43E

The numbers of protons, neutrons and electrons present in 2863Ni2+ are 28,35 and 26 respectively.

Explanation of Solution

The element given is 2863Ni2+ .

In this notation of elements, the subscript represents the atomic number and superscript represents the mass number.

So, the atomic number of 2863Ni2+ is 28 and mass number is equal to 63 . Atomic number is equivalent to number of protons, thus, number of proton is 28 .

Since it has a charge of +2 , this means that two electrons are lost. Therefore, number of electron is also equal to 282 that is 26 .

The formula used for the calculation of number of neutrons is shown below.

  Numberofneutrons=MassnumberAtomicnumber

Substitute the value of mass number and atomic number of 2863Ni2+ in the above formula.

  Numberofneutrons=MassnumberAtomicnumber=6328=35

Therefore, the number of neutrons in 2863Ni2+ is 35 .

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Chapter 2 Solutions

EBK CHEMICAL PRINCIPLES

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