Lewis Structures

Front

What is the octet rule in chemistry?

Back

The octet rule states that most elements need 8 valence electrons to be stable.

Front

How many valence electrons does hydrogen need to achieve stability?

Back

Hydrogen needs 2 electrons in its valence shell to be stable.

Front

What type of bond is formed between carbon and nitrogen in HCN?

Back

A triple bond is formed between carbon and nitrogen in HCN.

Front

What is the correct Lewis dot structure for the molecule fluorine (F2)?

Back

The correct Lewis dot structure for F2 shows each fluorine atom sharing one pair of electrons.

Front

What is the Lewis structure for BF3?

Back

The Lewis structure for BF3 shows boron as the central atom with three fluorine atoms bonded to it.

Front

What are Lewis structures used for?

Back

Lewis structures are used to represent the bonding between atoms in a molecule and the lone pairs of electrons.

Front

What is a lone pair in the context of Lewis structures?

Back

A lone pair is a pair of valence electrons that are not shared with another atom and are not involved in bonding.

Front

How do you determine the central atom in a Lewis structure?

Back

The central atom is usually the least electronegative element or the one that can form the most bonds.

Front

What is the significance of formal charge in Lewis structures?

Back

Formal charge helps to determine the most stable Lewis structure by indicating the distribution of electrons among atoms.

Front

What is the difference between a single bond, double bond, and triple bond?

Back

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