1.8 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 significance of lone pairs in Lewis Dot Structures?

Back

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

Front

What is the octet rule?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.

Front

How do you represent double bonds in Lewis Dot Structures?

Back

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

Front

What is the correct 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

Which molecule has only single bonds: CH4 or C2H4?

Back

CH4 (methane) has only single bonds, while C2H4 (ethylene) has a double bond.

Front

What is the Lewis Dot Structure for fluorine (F2)?

Back

The Lewis Dot Structure for F2 shows two fluorine atoms bonded together with three lone pairs of electrons on each atom.

Front

How do you determine if a Lewis Dot Structure is correct?

Back

A Lewis Dot Structure is correct if it satisfies the octet rule for each atom and accounts for all valence electrons.

Front

What is the Lewis Dot Structure for carbon dioxide (CO2)?

Back

The Lewis Dot Structure for CO2 shows a carbon atom in the center with two oxygen atoms double bonded to it.