Front

What is a Lewis structure?

Back

A Lewis 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 many valence electrons does phosphorus (P) have?

Back

Phosphorus has 5 valence electrons.

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

How many valence electrons does hydrogen (H) need to be stable?

Back

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

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

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 any charges.

Front

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

Back

The correct Lewis structure shows a double bond between carbon and each oxygen, with no lone pairs on carbon.

Front

What is the correct Lewis structure for water (H2O)?

Back

The correct Lewis structure shows oxygen with two lone pairs and single bonds to two hydrogen atoms.

Front

What is the correct Lewis structure for chloromethane (CH3Cl)?

Back

The correct Lewis structure shows carbon bonded to three hydrogens and one chlorine, with no lone pairs on carbon.

Front

What is a double bond in a Lewis structure?

Back

A double bond is a covalent bond where two pairs of electrons are shared between two atoms.