Lewis structures

Front

How many valence electrons does phosphorus have?

Back

5

Front

Is this a correct dot diagram for oxygen (O)?

Back

No, the correct dot diagram for oxygen should have 6 valence electrons represented.

Front

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

Back

8

Front

What is the correct Lewis structure for NH3?

Back

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

Front

When drawing Lewis structures, which electrons are used?

Back

Only valence electrons are used.

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.

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 determine the total number of valence electrons in a molecule?

Back

Add the valence electrons of all the atoms in the molecule, considering the number of each type of atom.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs represent non-bonding electrons that can affect the shape and reactivity of the molecule.

Front

What is the difference between bonding pairs and lone pairs?

Back

Bonding pairs are shared between atoms to form bonds, while lone pairs are not shared and belong to a single atom.