Lewis Dot Structures

Front

What is a Lewis Dot Structure?

Back

A Lewis Dot 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 do you determine the number of valence electrons in an atom?

Back

The number of valence electrons can be determined by looking at the group number of the element in the periodic table.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs represent non-bonding electrons that can affect the shape and reactivity of the molecule.

Front

What is the correct Lewis structure for water (H2O)?

Back

The correct Lewis structure shows the oxygen atom in the center with two hydrogen atoms bonded to it and two lone pairs of electrons on the oxygen.

Front

How do you represent double bonds in Lewis structures?

Back

Double bonds are represented by two lines between the atoms, indicating that two pairs of electrons are shared.

Front

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

Back

The correct Lewis structure shows a carbon atom in the center with two double bonds to two oxygen atoms.

Front

What is a molecular structure?

Back

A molecular structure refers to the three-dimensional arrangement of atoms in a molecule.

Front

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

Back

The correct Lewis structure shows phosphorus in the center bonded to three bromine atoms with one lone pair on phosphorus.

Front

What defines a lone pair of electrons?

Back

A lone pair is defined as a pair of non-bonding electrons that are not shared with another atom.

Front

What is the correct Lewis structure for hydrogen cyanide (HCN)?

Back

The correct Lewis structure shows a triple bond between carbon and nitrogen, with hydrogen bonded to carbon.