When a molecule has lone pairs on the central element the electron geometries are:

Question

BlackTom AI · Accepted Answer

Rephrased question: When a molecule has lone pairs on the central element, the electron geometries are:

Option 1: the same
- Why this is not correct: Electron geometry accounts for all electron domains around the central atom, including both bonding pairs and lone pairs. Lone pairs occupy space and influence the arrangement of electron domains, so the presence of lone pairs changes the electron-domain arrangement compared to a situation with no lone pairs. Therefore, the electron geometry is not the same as it would be if there were no lone pairs.

Option 2: different
- Why this is correct: Because lone pairs add additional electron domains around the central atom, they alter the overall electron-domain geometry. For example, a central atom with two bonding pairs and two lone pairs has a different electron geometry (tetrahedral electron-domain geometry) than if those lone pairs were absent (which could yield a different count of electron domains). In short, lone pairs change the electron geometry, making it different from the geometry you would have without them.

Additional context: The distinction between electron geometry and molecular geometry hinges on whether lone pairs are counted in the arrangement. Electron geometry describes where all electron regions are located, while molecular geometry describes the arrangement of only the atoms (ignoring lone pairs). This nuance is exactly why lone pairs affect the electron geometry but not the same sense of symmetry when considering only atoms in space.

1A W25 VSEPR-Atoms with Lone Pairs

When a molecule has lone pairs on the central element the electron geometries are:

查看解析

登录即可查看完整答案

类似问题

Using the VSEPR model, what are the respective electron-domain geometries of carbon dioxide (CO2) and ammonia (NH3)? I: CO2 [ Select ] trigonal bipyramidal octahedral trigonal planar tetrahedral linear II: NH3 [ Select ] tetrahedral trigonal planar octahedral linear trigonal bipyramidal 13A

The electron domain geometry of IF4+ is __________.

Match the following descriptors about a central atom in a molecule to its shape as described by VESPR 1: 3 Connected Atoms, No Lone Pairs 2: 3 Connected Atoms, One Lone Pair 3: 4 Connected Atoms , No Lone Pairs

Question at position 20 Which of the listed compounds is part of the tetrahedral electron group arrangement? SO2 AsF3 CO2 ICl4–

Question at position 26 Use VSEPR theory to predict the molecular shape of SOCl2? Trigonal pyramidalSquare pyramidal Square planar Tetrahedral Bent

Question at position 22 Which species has the smallest bond angle? ClO3– ClO2– ClO2+ ClO4–

Question at position 9 Predict the actual bond angles in N2F+ using the VSEPR theory. less than 109.5° 90° 120° 180° less than 120° 109.5°

Question at position 18 Predict the actual bond angles in N2F+ using the VSEPR theory. less than 109.5° 120° 90° 109.5°180° less than 120°

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单