
Concept explainers
Draw the Lewis structure and name the molecular geometry for each molecule.
- a. H2S
- b. OCl2 (oxygen is the central atom)
- c. N2O (nitrogen is the central atom)
(a)

Interpretation:
The Lewis structure and name of molecular geometry should be provided for the given molecule H2S.
Concept Introduction:
Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.
The chemical bonding present in covalently bonded molecules and in coordination compounds are represented using Lewis structures.
It is also known as Lewis dot structures which represents the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
The Lewis structure is based on the concept of the octet rule so that the electrons shared in each atom should have 8 electrons in its outer shell.
Sometimes the chemical bonding of a molecule cannot be represented using a single Lewis structure. In these cases, the chemical bonding are described by delocalization of electrons and is known as resonance.
All the possible resonance structures are imaginary whereas the resonance hybrid is real.
These structures will differ only in the arrangement of the electrons not in the relative position of the atomic nuclei.
Lewis structure for any molecule is drawn by using the following steps,
First the skeletal structure for the given molecule is drawn then the total number of valence electrons for all atoms present in the molecule is determined
The next step is to subtract the electrons present in the total number of bonds present in the skeletal structure of the molecule with the total valence electrons such that considering each bond contains two electrons with it.
Finally, the electrons which got after subtractions have to be equally distributed such that each atom contains eight electrons in its valence shell.
Molecular geometry is the shape of a molecule predicted by considering only bond pair of electrons.
Geometry of different type of molecules with respect to the number of electron pairs are mentioned below,
Type of Molecule No. of atomsbonded to central atomsNo. of lone pairs on central atomArrangement of electron pairsMolecularGeometryAB220LinearLinearAB330Trigonal planarTrigonal planarAB440TetrahedralTetrahedralAB550Trigonal bipyramidalTrigonal bipyramidalAB660OctahedralOctahedral
Explanation of Solution
The Lewis electron dot structure for given molecules are determined by first drawing the skeletal structure for the given molecules, then the total number of valence electrons for all atoms present in the molecules are determined.
The next step is to subtract the electrons present in the total number of bonds present in the skeletal structure of the molecule with the total valence electrons such that considering each bond contains two electrons with it.
Finally, the electrons which got after subtractions have to be equally distributed considering each atom contains eight electrons in its valence shell.
The given moleucle is H2S
S = 1 × 6H = 2×1 Total = 8 2 bonds = 2× 2 = 4 = 8−4= 4’
Thus, the Lewis structure of given compound is,
There are two sets of lone pair electrons on the central atom sulfur along with two bond pair of electrons and so its molecular geometry is bent.
(b)

Interpretation:
The Lewis structure and name of molecular geometry should be provided for the given molecule OCl2.
Concept Introduction:
Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.
The chemical bonding present in covalently bonded molecules and in coordination compounds are represented using Lewis structures.
It is also known as Lewis dot structures which represents the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
The Lewis structure is based on the concept of the octet rule so that the electrons shared in each atom should have 8 electrons in its outer shell.
Sometimes the chemical bonding of a molecule cannot be represented using a single Lewis structure. In these cases, the chemical bonding are described by delocalization of electrons and is known as resonance.
All the possible resonance structures are imaginary whereas the resonance hybrid is real.
These structures will differ only in the arrangement of the electrons not in the relative position of the atomic nuclei.
Lewis structure for any molecule is drawn by using the following steps,
First the skeletal structure for the given molecule is drawn then the total number of valence electrons for all atoms present in the molecule is determined
The next step is to subtract the electrons present in the total number of bonds present in the skeletal structure of the molecule with the total valence electrons such that considering each bond contains two electrons with it.
Finally, the electrons which got after subtractions have to be equally distributed such that each atom contains eight electrons in its valence shell.
Molecular geometry is the shape of a molecule predicted by considering only bond pair of electrons.
Geometry of different type of molecules with respect to the number of electron pairs are mentioned below,
Type of Molecule No. of atomsbonded to central atomsNo. of lone pairs on central atomArrangement of electron pairsMolecularGeometryAB220LinearLinearAB330Trigonal planarTrigonal planarAB440TetrahedralTetrahedralAB550Trigonal bipyramidalTrigonal bipyramidalAB660OctahedralOctahedral
Explanation of Solution
The Lewis electron dot structure for given molecules are determined by first drawing the skeletal structure for the given molecules, then the total number of valence electrons for all atoms present in the molecules are determined.
The next step is to subtract the electrons present in the total number of bonds present in the skeletal structure of the molecule with the total valence electrons such that considering each bond contains two electrons with it.
Finally, the electrons which got after subtractions have to be equally distributed considering each atom contains eight electrons in its valence shell.
The given moleucle is OCl2, oxygen is the central atom.
O = 1 × 6Cl = 2×7 Total = 20 2 bonds = 2× 2 = 4 = 20−4= 16’
Thus, the Lewis structure of given compound is,
There are two lone pair of electron on the central atom oxygen along with two bond pair of electrons and so its molecular geometry is bent.
(c)

Interpretation:
The Lewis structure and name of molecular geometry should be provided for the given molecule N2O.
Concept Introduction:
Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.
The chemical bonding present in covalently bonded molecules and in coordination compounds are represented using Lewis structures.
It is also known as Lewis dot structures which represents the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
The Lewis structure is based on the concept of the octet rule so that the electrons shared in each atom should have 8 electrons in its outer shell.
Sometimes the chemical bonding of a molecule cannot be represented using a single Lewis structure. In these cases, the chemical bonding are described by delocalization of electrons and is known as resonance.
All the possible resonance structures are imaginary whereas the resonance hybrid is real.
These structures will differ only in the arrangement of the electrons not in the relative position of the atomic nuclei.
Lewis structure for any molecule is drawn by using the following steps,
First the skeletal structure for the given molecule is drawn then the total number of valence electrons for all atoms present in the molecule is determined
The next step is to subtract the electrons present in the total number of bonds present in the skeletal structure of the molecule with the total valence electrons such that considering each bond contains two electrons with it.
Finally, the electrons which got after subtractions have to be equally distributed such that each atom contains eight electrons in its valence shell.
Molecular geometry is the shape of a molecule predicted by considering only bond pair of electrons.
Geometry of different type of molecules with respect to the number of electron pairs are mentioned below,
Type of Molecule No. of atomsbonded to central atomsNo. of lone pairs on central atomArrangement of electron pairsMolecularGeometryAB220LinearLinearAB330Trigonal planarTrigonal planarAB440TetrahedralTetrahedralAB550Trigonal bipyramidalTrigonal bipyramidalAB660OctahedralOctahedral
Explanation of Solution
The Lewis electron dot structure for given molecules are determined by first drawing the skeletal structure for the given molecules, then the total number of valence electrons for all atoms present in the molecules are determined.
The next step is to subtract the electrons present in the total number of bonds present in the skeletal structure of the molecule with the total valence electrons such that considering each bond contains two electrons with it.
Finally, the electrons which got after subtractions have to be equally distributed considering each atom contains eight electrons in its valence shell.
The given moleucle is N2O
N = 2 × 5O = 1×6Total = 16 4 bonds = 4× 2 = 8 = 16−8= 8
Thus, the Lewis structure of given compound is,
Since the molecule has two bond pair of electrons, (multiple bond is consider as a single bond) its molecular geometry is linear.
Want to see more full solutions like this?
Chapter 3 Solutions
Chemistry in Context
Additional Science Textbook Solutions
Laboratory Experiments in Microbiology (12th Edition) (What's New in Microbiology)
General, Organic, and Biological Chemistry - 4th edition
Laboratory Manual For Human Anatomy & Physiology
Essentials of Human Anatomy & Physiology (12th Edition)
Microbiology with Diseases by Body System (5th Edition)
Genetics: From Genes to Genomes
- E17E.2(a) The following mechanism has been proposed for the decomposition of ozone in the atmosphere: 03 → 0₂+0 k₁ O₁₂+0 → 03 K →> 2 k₁ Show that if the third step is rate limiting, then the rate law for the decomposition of O3 is second-order in O3 and of order −1 in O̟.arrow_forward10.arrow_forwardDon't used Ai solution and don't used hand raitingarrow_forward
- 2arrow_forwardWhich of the following starting materials and reagents would be best to produce a racemic mixture of 3-methyl-3-hexanol? heptanone and 1. CH3MgBr 2. H3O+ hexanal and 1. CH3MgBr, 2. H3O+ 3-hexanone and 1. CH3MgBr, 2. H3O+ butanal and 1. CH3CH2MgBr, 2. H3O+arrow_forwardCan someone draw a reaction mechanism of this reaction please I was told that the boc l alanine is deprotonated first and acts as the nucleophile attacking the EDCL and can you please show all the intermediates and side products and the water at the endarrow_forward
- World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning
