Domanda del libro di testo
A molecule with the formula AB2 has a linear geometry. How many electron groups are on the central atom?
Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Non è quello che usi tu?Cambia libro di testo
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Tro 6th EditionCh.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO TheoryProblema 31
Tro 6th EditionCh.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO TheoryProblema 31Capitolo 11, Problema 31
A molecule with the formula AB3 has a trigonal pyramidal geometry. How many electron groups are on the central atom (A)?
Guida verificata passo dopo passo1
Step 1: Understand the concept of electron groups. Electron groups around a central atom include bonding pairs (shared electrons in covalent bonds) and lone pairs (non-bonding electrons). These groups determine the molecular geometry.
Step 2: Recall the geometry of a trigonal pyramidal molecule. A trigonal pyramidal shape arises when there are three bonding pairs and one lone pair of electrons around the central atom.
Step 3: Add the number of bonding pairs and lone pairs to determine the total number of electron groups. In this case, there are 3 bonding pairs (from the AB3 formula) and 1 lone pair, making a total of 4 electron groups.
Step 4: Relate the electron groups to the molecular geometry. The trigonal pyramidal geometry is consistent with 4 electron groups around the central atom, where one of the groups is a lone pair.
Step 5: Conclude that the central atom (A) in the AB3 molecule has 4 electron groups, which include 3 bonding pairs and 1 lone pair.
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Molecular Geometry
Molecular geometry refers to the three-dimensional arrangement of atoms within a molecule. It is determined by the number of bonding pairs and lone pairs of electrons around the central atom. In the case of AB3 with trigonal pyramidal geometry, the arrangement is influenced by the presence of lone pairs that repel bonding pairs, leading to a specific shape.
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Percorso guidato
01:33
Molecular Geometry with Two Electron Groups
Electron Groups
Electron groups include both bonding pairs of electrons (shared between atoms) and lone pairs (non-bonding electrons) around a central atom. The total number of electron groups determines the molecular geometry according to the VSEPR (Valence Shell Electron Pair Repulsion) theory. For a trigonal pyramidal shape, the central atom must have four electron groups.
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Percorso guidato
00:51Electron Groups Example
VSEPR Theory
VSEPR (Valence Shell Electron Pair Repulsion) theory is a model used to predict the geometry of molecules based on the repulsion between electron pairs. According to this theory, electron groups will arrange themselves as far apart as possible to minimize repulsion. In the case of AB3, the presence of one lone pair leads to a trigonal pyramidal shape, indicating that there are four electron groups around the central atom.
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Percorso guidato
02:13Molecular Shapes and VSEPR
Pratica correlata
Domanda del libro di testo
Determine the electron geometry, molecular geometry, and idealized bond angles for each molecule. In which cases do you expect deviations from the idealized bond angle?
a. CI4
b. NCl3
c. OF2
d. H2S
Domanda del libro di testo
For each molecular geometry, list the number of total electron groups, the number of bonding groups, and the number of lone pairs on the central atom. (c)
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