Flashcard 6-1: Lewis Structures and Molecular Geometry

Front

What is a Lewis structure?

Back

A Lewis structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

How many lone pairs does NH3 have?

Back

1

Front

What is the molecular geometry of NH3?

Back

Trigonal pyramidal.

Front

What is the correct Lewis structure for carbon dioxide (CO2)?

Back

The Lewis structure shows a carbon atom double bonded to two oxygen atoms, with each oxygen having two lone pairs.

Front

What is the shape of a molecule with two bonding pairs and no lone pairs?

Back

Linear.

Front

What is the shape of a molecule with three bonding pairs and one lone pair?

Back

Trigonal pyramidal.

Front

What is the shape of a molecule with four bonding pairs and no lone pairs?

Back

Tetrahedral.

Front

What is the Lewis structure for O2?

Back

The Lewis structure shows two oxygen atoms connected by a double bond, with each oxygen having two lone pairs.

Front

What is the correct Lewis dot structure for fluorine (F2)?

Back

The Lewis structure shows two fluorine atoms connected by a single bond, with three lone pairs on each atom.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs occupy space and can affect the shape of the molecule by repelling bonding pairs.