Chemical Principles in the Laboratory
Chemical Principles in the Laboratory
11th Edition
ISBN: 9781305264434
Author: Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher: Brooks Cole
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Chapter 13, Problem 1ASA

First you need to find the number of valence electrons in NH 2 Cl . For counting purposes with Lewis structures, the number of valence electrons in an atom of a main group element is equal to the last digit in the group number of that element in the Periodic Table.

N is in Group ________ H is in Group ________ Cl is in Group _________

In NH 2 Cl there is a total of ____________ valence electrons.

Expert Solution & Answer
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Interpretation Introduction

Interpretation:

The given blanks are to be filled.

Concept introduction:

The periodic table represents elements in order of their atomic number. In the modern periodic table, the horizontal rows are known as periods and vertical columns are known as groups. There are seven periods and eighteenth groups in the modern periodic table. The valence electron of an element is the number of electrons present in the last shell of an atom of that element.

Answer to Problem 1ASA

Nitrogen (N) is in Group 15 hydrogen (H) is in Group 1 chorine (Cl) is in Group 17

In NH2Cl there is a total of 14 valence electrons.

Explanation of Solution

The nitrogen belongs to the group 15. The number of valance electrons in nitrogen atom is 5.

The chlorine belongs to the group 17. The number of valance electrons in nitrogen atom is 7.

The hydrogen belongs to the group 1. The number of valence electrons in the hydrogen atom is 1.

The total number of valance electrons in NH2Cl is calculated as shown below.

Ne=NN+2NH+NCl

Where,

  • NN is the number of valence electrons in a nitrogen atom.
  • NH is the number of valence electrons in a hydrogen atom.
  • NCl is the number of valence electrons in a chlorine atom.

Substitute the value of NN, NH and NCl in the above equation.

Ne=5+2(1)+(7)=5+2+7=14

Therefore, the completed sentences are as follows.

Nitrogen (N) is in Group 15 hydrogen (H) is in Group 1 chorine (Cl) is in Group 17

In NH2Cl there is a total of 14 valence electrons.

Conclusion

The number of valance electron in NH2Cl14.

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