Lewis Structures

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 nitrogen (N) have?

Back

5 valence electrons.

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

What is the molecular geometry of a molecule with 4 bonding pairs and 0 lone pairs?

Back

Tetrahedral.

Front

What is the difference between polar and nonpolar molecules?

Back

Polar molecules have an uneven distribution of electron density, leading to a dipole moment, while nonpolar molecules have an even distribution.

Front

How do you determine if a molecule is polar?

Back

Check for the presence of polar bonds and the molecular geometry; if the dipoles do not cancel out, the molecule is polar.

Front

What is the dot diagram for oxygen (O)?

Back

The dot diagram for oxygen shows 6 valence electrons arranged as two lone pairs and two bonding pairs.

Front

What is the molecular geometry of ammonia (NH3)?

Back

Trigonal Pyramidal.

Front

What is the correct dot diagram for sodium (Na)?

Back

True, sodium has 1 valence electron represented as a single dot.

Front

What is the correct dot diagram for fluorine (F)?

Back

True, fluorine has 7 valence electrons represented as 6 dots around the symbol with one bond.