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

What does the octet rule state?

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 many valence electrons does carbon (C) have?

Back

Carbon has 4 valence electrons.

Front

What is the Lewis structure for water (H2O)?

Back

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

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

Which elements typically form double bonds in Lewis structures?

Back

Elements like carbon, oxygen, and nitrogen often form double bonds to satisfy the octet rule.

Front

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

Back

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

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 phosphorus tribromide (PBr3)?

Back

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

Front

What is a resonance structure?

Back

A resonance structure is one of two or more valid Lewis structures for a molecule that cannot be represented accurately by a single structure.