Lewis Structures

Front

What is a covalent bond?

Back

A covalent bond is a bond that shares electrons between nonmetals.

Front

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

Back

The Lewis Dot Structure for ammonia (NH3) shows a nitrogen atom in the center with three hydrogen atoms bonded to it, and a lone pair of electrons on the nitrogen.

Front

What is the correct Lewis structure for water (H2O)?

Back

The correct Lewis structure for water (H2O) has an oxygen atom in the center with two hydrogen atoms bonded to it, and two lone pairs of electrons on the oxygen.

Front

How many valence electrons are available for bonding in the sulfate ion (SO4^2-)?

Back

There are 32 valence electrons available for bonding in the sulfate ion (SO4^2-).

Front

What is a valid Lewis structure for hydrogen cyanide (HCN)?

Back

A valid Lewis structure for hydrogen cyanide (HCN) has a hydrogen atom bonded to a carbon atom, which is triple-bonded to a nitrogen atom.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are available for bonding.

Front

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

Back

To determine the total number of valence electrons in a molecule, add the valence electrons of each atom in the molecule.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs in Lewis structures 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 and triple bonds in Lewis structures?

Back

Double bonds are represented by two lines between atoms, while triple bonds are represented by three lines.