The electron-region geometry for electron pairs from two to six around a central atom has to be designated. Concept Introduction: Electron geometry is the shape of a molecule predicted by considering both bond electron pairs and lone pair of electrons. 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, T y p e o f M o l e c u l e N o . o f a t o m s b o n d e d t o c e n t r a l a t o m s N o . o f l o n e p a i r s o n c e n t r a l a t o m A r r a n g e m e n t o f e l e c t r o n p a i r s M o l e c u l a r G e o m e t r y A B 2 2 0 L i n e a r L i n e a r A B 3 3 0 T r i g o n a l p l a n a r T r i g o n a l p l a n a r A B 4 4 0 T e t r a h e d r a l T e t r a h e d r a l A B 5 5 0 T r i g o n a l b i p y r a m i d a l T r i g o n a l b i p y r a m i d a l A B 6 6 0 O c t a h e d r a l O c t a h e d r a l

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Chapter 7, Problem 3QRT

Interpretation Introduction

Interpretation:

The electron-region geometry for electron pairs from two to six around a central atom has to be designated.

Concept Introduction:

Electron geometry is the shape of a molecule predicted by considering both bond electron pairs and lone pair of electrons.

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

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