Front

What is the expanded octet rule in chemistry?

Back

The expanded octet rule states that certain elements, particularly those in the third period and beyond, can accommodate more than eight electrons in their valence shell.

Front

Which elements are known to have an expanded octet?

Back

Elements such as sulfur, phosphorus, and chlorine can have an expanded octet.

Front

Can hydrogen have an expanded octet?

Back

No, hydrogen cannot have an expanded octet; it can only accommodate a maximum of two electrons.

Front

What is a Lewis structure?

Back

A Lewis structure is a diagram that represents the bonding between atoms of a molecule and the lone pairs of electrons that may exist.

Front

How do you determine if a Lewis structure is valid?

Back

A Lewis structure is valid if it satisfies the octet rule for main group elements, has the correct number of total valence electrons, and shows the correct connectivity of atoms.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons, achieving a stable electron configuration.

Front

What is the significance of lone pairs in Lewis structures?

Back

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

Front

What is the role of sulfur in forming compounds with expanded octets?

Back

Sulfur can form compounds with expanded octets by utilizing its d-orbitals to accommodate more than eight electrons.

Front

What is a common mistake when drawing Lewis structures?

Back

A common mistake is failing to account for the total number of valence electrons or incorrectly applying the octet rule.

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.