Lesson Check - Lewis Dot Structures for Cmps (2024-2025)

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 phosphorus (P) have?

Back

Phosphorus has 5 valence electrons.

Front

What is the Lewis structure for PBr3?

Back

The Lewis structure for PBr3 shows phosphorus in the center with three bromine atoms bonded to it and one lone pair of electrons on phosphorus.

Front

What is the significance of lone pairs in Lewis structures?

Back

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

Front

How many lone pairs are present in ammonia (NH3)?

Back

Ammonia (NH3) has 1 lone pair of electrons on the nitrogen atom.

Front

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

Back

The Lewis structure for CO2 shows a carbon atom double bonded to two oxygen atoms, with each oxygen having two lone pairs.

Front

What element is represented by the symbol Al in a Lewis structure?

Back

Aluminum (Al) is represented by the symbol Al in a Lewis structure.

Front

How many valence electrons does carbon (C) have?

Back

Carbon has 4 valence electrons.

Front

What is the molecular geometry of ammonia (NH3)?

Back

The molecular geometry of ammonia (NH3) is trigonal pyramidal due to the presence of one lone pair.