7.2C Covalent Lewis Structures

Front

What is a lone pair in a covalent bond?

Back

A lone pair is a pair of valence electrons that are not shared with another atom and are not involved in bonding.

Front

How many lone pairs does ammonia (NH3) have?

Back

1

Front

What is the molecular structure of carbon dioxide (CO2)?

Back

The molecular structure of carbon dioxide is linear, with a carbon atom double bonded to two oxygen atoms (O=C=O).

Front

How many double bonds are present in chloroform (CHCl3)?

Back

0

Front

What is the total number of valence electrons in the nitrate ion (NO3-)?

Back

24

Front

How many total valence electrons are participating in bonding in the nitrate ion (NO3-)?

Back

8

Front

What is the octet rule in covalent bonding?

Back

The octet rule states that atoms tend to form bonds until they are surrounded by eight valence electrons, achieving a stable electron configuration.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the significance of valence electrons in covalent bonding?

Back

Valence electrons are the electrons in the outermost shell of an atom and are involved in forming bonds with other atoms.

Front

How do you determine the number of valence electrons in an atom?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.