For example a steric number of three gives **a trigonal planar electronic shape**. The angles between electron domains are determined primarily by the electronic geometry (e.g., 109.5° for a steric number of 4, which implies that the electronic shape is a tetrahedron)

Contents

- 1 What is the molecular geometry if the central atom has a steric number of 3 which includes 1 lone pair?
- 2 How are steric number and electron geometries related?
- 3 What is the electron geometry of PH 3?
- 4 What is electron group geometry?
- 5 What is the molecular structure of SnCl − 3?
- 6 What is the molecular geometry of a molecule with 3 outer atoms and 1 lone pair on the central atom?
- 7 What is electron pair geometry vs molecular geometry?
- 8 How many electron geometries are there?
- 9 Is SO2 an electron geometry?
- 10 What is the electron geometry of SBr2?
- 11 What is the electron pair geometry of CH2Se?

## What is the molecular geometry if the central atom has a steric number of 3 which includes 1 lone pair?

For example; four electron pairs are distributed in a tetrahedral shape. If these are all bond pairs the molecular geometry is tetrahedral (e.g. CH4). If there is one lone pair of electrons and three bond pairs the resulting molecular geometry is trigonal pyramidal (e.g. NH3).

The steric number gives the electron-pair arrangement for the geometry that maximizes the distance between valence electron pairs. The steric number is calculated using the following formula: Steric Number = (number of lone electron pairs on the central atom) + (number of atoms bonded to the central atom)

## What is the electron geometry of PH 3?

There are three sigma bonds and one lone-pair around phosphorus atom. Therefore, shape of PH_{3} is trigonal pyramidal. Summation of number of sigma bonds and lone-pairs around phosphorus atom is four. Therefore geometry should be tetrahedral.

## What is electron group geometry?

Electron group geometry is the three-dimensional arrangement of atoms in a molecule. The geometry of a molecule is an important factor that affects the physical and chemical properties of a compound.

## What is the molecular structure of SnCl − 3?

SOLUTION (a) The Lewis structure for the SnCl_{3}^{–}; ion is: The central Sn atom is surrounded by one nonbonding electron pair and three single bonds. Thus, the electron-pair geometry is tetrahedral with three of the corners occupied by the bonding pairs of electrons.

## What is the molecular geometry of a molecule with 3 outer atoms and 1 lone pair on the central atom?

Thus, the molecular geometry of the molecule with 3 outer atoms and 1 lone pair in the central atom is trigonal pyramidal.

## What is electron pair geometry vs molecular geometry?

The main difference between electron geometry and molecular geometry is that electron geometry is found by taking both lone electron pairs and bonds in a molecule whereas molecular geometry is found using only the bonds present in the molecule.

## How many electron geometries are there?

It does not matter whether a bonded atom is atached with a single, double or triple bond, each noncentral atom counts as one electron domain on the central atom. There are five basic electron domain geometries.

## Is SO2 an electron geometry?

SO2 is an AX2E type molecule, with 2 surrounding atoms i.e oxygen, and 1 lone pair of sulfur. But the electron geometry of SO2 is trigonal planar.

## What is the electron geometry of SBr2?

(b) SBr2: Electron geometry- tetrahedral; molecular geometry-trigonal pyramidal; bond angle = 109.5° Because of the lone pair, the bond angle will be less than 109.5°.

## What is the electron pair geometry of CH2Se?

Question: Draw the Lewis structure for CH2Se (C is the central atom) and answer the questions below. and The steric number is 5 the molecular geometry is trigonal planar, the electron pair geometry is trigonal planar and has double bonds.