Simple 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. For example, elements in Group 1 have 1 valence electron, while those in Group 2 have 2.

Front

What is the Lewis Dot Structure for ammonia (NH3)?

Back

The Lewis Dot Structure for ammonia shows nitrogen in the center with three hydrogen atoms bonded to it and one lone pair of electrons on nitrogen.

Front

What type of bonds are present in a molecule with only single bonds?

Back

A molecule with only single bonds contains sigma bonds, which are formed by the head-on overlap of atomic orbitals.

Front

Which compounds typically have only single bonds?

Back

Compounds like alkanes (e.g., ethane, propane) typically have only single bonds.

Front

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

Back

The Lewis structure for PBr3 shows phosphorus in the center with three bromine atoms bonded to it and one lone pair of electrons on phosphorus.

Front

What is the molecular structure of carbon dioxide (CO2)?

Back

The molecular structure of carbon dioxide is linear, with carbon in the center and two oxygen atoms double bonded to it.

Front

How do you represent double bonds in Lewis Dot Structures?

Back

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

Front

What is the Lewis structure for water (H2O)?

Back

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

Front

What is the significance of lone pairs in Lewis Dot Structures?

Back

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