Lewis Structures Flashcard

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 do you determine the total number of valence electrons in a molecule?

Back

Add the valence electrons of each atom in the molecule. For ions, add or subtract electrons based on the charge.

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 octet rule?

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 do you represent double bonds in Lewis structures?

Back

Double bonds are represented by two lines between the bonded atoms, indicating that two pairs of electrons are shared.

Front

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

Back

O=C=O, with each oxygen having two lone pairs.

Front

How many total electrons are used in the Lewis structure for NO3-?

Back

24 electrons.

Front

What is the Lewis structure for silicon tetrafluoride (SiF4)?

Back

F-Si-F with two lone pairs on each fluorine.

Front

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

Back

F:F, with three lone pairs on each fluorine.

Front

How do you represent resonance structures?

Back

Resonance structures are represented by drawing multiple valid Lewis structures for the same molecule, separated by a double-headed arrow.