2.6 Resonance and Formal Charge

Can there be several structures drawn when drawing Lewis Dot diagrams for some molecules and polyatomic ions?

Yes

a method that can help determine which Lewis Dot structure is most valid

Formal charge

How to calculate formal charge for each atom of a molecule?

Determine number of valence electrons for an atom and subtract the sum of lone electrons and bonds connected to the atom from that number

The sum of the formal charges of each atom should add up to ______ for a molecule or add up to ______ for a polyatomic ion.

zero; the charge

In the most valid Electron Dot Structure, formal charges are ______ for all atoms

As close to zero

In the most valid Electron Dot structure, negative formal charges are placed on the ______

most electronegative atom

Might there be more than one Lewis Dot arrangement of bonds/electrons that are equally valid?

Yes

When there are two valid Electron Dot structures, how should you draw it?

Draw both

Resonance is structures are present:

simultaneously

Do resonance structures flip between themselves?

No

The electrons of resonance structures can be described as:

delocalized

The actual structure of resonance structures is:

an average of the resonance structures

In resonance structures, the bond length is:

An average of the bonds present

How to represent resonance structures?

Draw all the structures of the molecule, keeping the arrangement of the atoms the same but changing the location of the electrons. Double arrows are drawn between the structures.

Why are double arrows drawn between resonance structures?

To indicating that the structures are superimposed to make a hybrid