Lewis Structures

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

What does a dot diagram represent in chemistry?

Back

A dot diagram represents the valence electrons of an atom, showing how they are arranged in pairs or as lone pairs.

Front

How many valence electrons does boron (B) have?

Back

Boron has 3 valence electrons.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs are pairs of valence electrons that are not involved in bonding and can affect the shape and reactivity of the molecule.

Front

How do you determine the total number of valence electrons in a molecule?

Back

Add the valence electrons of all the atoms in the molecule, considering the charge if it is an ion.

Front

What is the correct Lewis structure for BF3?

Back

BF3 has boron in the center with three fluorine atoms bonded to it, and no lone pairs on boron.

Front

What is the Lewis structure for phosphorus tribromide (PBr3)?

Back

PBr3 has phosphorus in the center with three bromine atoms bonded to it and one lone pair on phosphorus.

Front

How many lone pairs are present in HCl?

Back

HCl has 3 lone pairs on the chlorine atom.

Front

What is the total number of lone pairs in PF3?

Back

PF3 has 1 lone pair on phosphorus.

Front

What is the correct dot diagram for oxygen (O)?

Back

The correct dot diagram for oxygen shows 6 valence electrons, with 2 pairs and 2 single electrons.