Lewis Dot Structures Review

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 total number of valence electrons in a molecule?

Back

To determine the total number of valence electrons, add the valence electrons of each atom in the molecule based on its group number in the periodic table.

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 is the correct molecular structure for carbon dioxide (CO2)?

Back

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

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.

Front

What is the Lewis structure for water (H2O)?

Back

The Lewis Dot 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 difference between a single bond, double bond, and triple bond in Lewis structures?

Back

A single bond involves one pair of shared electrons, a double bond involves two pairs, and a triple bond involves three pairs of shared electrons.

Front

How do you represent a negative charge in a Lewis Dot Structure?

Back

A negative charge is represented by adding an extra electron to the total count of valence electrons for that atom.

Front

What is the acceptable Lewis structure for CH3Cl?

Back

The acceptable Lewis structure for CH3Cl shows carbon bonded to three hydrogen atoms and one chlorine atom.

Front

What is the octet rule in relation to Lewis Dot Structures?

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.