4.3 Lewis Dot Structures

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 is the significance of valence electrons in Lewis Dot Structures?

Back

Valence electrons are the outermost electrons of an atom and are crucial in determining how atoms bond in a 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. For example, NH3 has 5 (N) + 3(1) (H) = 8 valence electrons.

Front

What is the correct Lewis Dot Structure for ammonia (NH3)?

Back

The Lewis Dot Structure for NH3 shows nitrogen in the center with three hydrogen atoms bonded to it and one lone pair of electrons on nitrogen.

Front

What is the correct formula for ammonia?

Back

NH3

Front

Which of the following compounds has only single bonds: I (C2H6), II (C2H4), III (C2H2), IV (C2)?

Back

III (C2H2) and IV (C2) have only single bonds.

Front

What is the correct formula for silicon tetrafluoride?

Back

SiF4

Front

What is a molecular formula?

Back

A molecular formula shows the number and type of atoms in a molecule, such as H2O for water.

Front

What is the difference between a single bond and a double bond?

Back

A single bond involves one pair of shared electrons, while a double bond involves two pairs of shared electrons.

Front

What is the correct Lewis Dot Structure for hydrogen cyanide (HCN)?

Back

The Lewis Dot Structure for HCN shows a triple bond between carbon and nitrogen, and a single bond between carbon and hydrogen.