Lewis structures

Front

What is a Lewis structure?

Back

A Lewis structure is a diagram that represents the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What does the octet rule state?

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 many electrons does hydrogen need to be stable?

Back

Hydrogen needs 2 electrons in its outer energy level to be stable.

Front

According to the octet rule, how many valence electrons do most elements need?

Back

Most elements need 8 valence electrons according to the octet rule.

Front

What is a single bond in terms of electron sharing?

Back

A single bond involves the sharing of one pair of electrons between two atoms.

Front

What is a double bond in terms of electron sharing?

Back

A double bond involves the sharing of two pairs of electrons between two atoms.

Front

What is a triple bond in terms of electron sharing?

Back

A triple bond involves the sharing of three pairs of electrons between two atoms.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs are pairs of valence electrons that are not shared with another atom and can affect the shape and reactivity of the molecule.

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 all the atoms in the molecule.

Front

What is the correct Lewis structure for NH3?

Back

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