## Readers ask: A Molecule With The Formula Ab3 Has A Trigonal Pyramidal Geometry. How Many Electron Groups?

it has three bonding groups and no lone pairs – three electron groups on the central atom.

## How many electron groups are on the central atom AB3 trigonal pyramidal?

FREE Expert Solution. There are 4 electron groups on the central atom.

## What is the molecular geometry of AB3 type molecule with 3 electron domains?

A molecule with the formula AB3 has a trigonal pyramidal geometry.

## How many lone pairs does AB3 have?

Question: A molecule has the formula AB3 and the central atom has two lone pairs on it.

## Is AB3 trigonal planar?

A molecule with the formula AB3 has a trigonal planar geometry.

## What is trigonal planar in chemistry?

Trigonal planar: triangular and in one plane, with bond angles of 120°. Tetrahedral: four bonds on one central atom with bond angles of 109.5°. Trigonal bipyramidal: five atoms around the central atom; three in a plane with bond angles of 120° and two on opposite ends of the molecule.

## How many electron groups are on the central atom?

There are six electron groups around the central atom, each a bonding pair.

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## What is the shape of an AB3 molecule?

For AB3 molecules, the two most common shapes place the B atoms at the corners of an equilateral triangle. If the A atom lies in the same plane as the B atoms, the shape is called trigonal planar.

## What shape is 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 makes a trigonal pyramidal?

Central atom will at the apex and three other atoms or ligands will be at one base, where they are in the three corners of a triangle. There is one lone pair of electrons in the central atom. So when the position of the lone pair is neglected, the remaining bonds make the trigonal pyramidal geometry.

## How many outer atoms are in a trigonal pyramidal shape?

A trigonal planar geometry is observed when the central atom has three outer atoms and one lone pair. The general structure of these compounds is shown below where A represents the central atom and X represents the bonded atoms.

## How many electron groups are there in SE?

Use valence bond theory to describe the bonding and geometry in the SeF4 molecule. A. The central atom is Se, which has five electron groups around it (four bonding pairs and one nonbonding/lone pair). The electron-group geometry is trigonal bipyramidal (and the molecular geometry is see-saw).