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 many valence electrons does nitrogen (N) have?

Back

Nitrogen has 5 valence electrons.

Front

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

Back

The nitrate ion has 24 valence electrons (5 from nitrogen and 18 from three oxygen atoms, plus 1 extra electron due to the negative charge).

Front

What is the Lewis structure for ammonia (NH3)?

Back

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

Front

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

Back

The molecular geometry of carbon dioxide is linear.

Front

How many double bonds are present in carbon tetrachloride (CCl4)?

Back

There are 0 double bonds in carbon tetrachloride (CCl4).

Front

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

Back

The Lewis dot structure for fluorine (F2) shows two fluorine atoms bonded together with three lone pairs of electrons on each atom.

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

What is a lone pair of electrons?

Back

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

Front

How do you determine the central atom in a Lewis structure?

Back

The central atom is usually the least electronegative atom or the atom that can form the most bonds.