Lewis Dot Structures - Ionic and Covalent

Front

What is the octet rule in chemistry?

Back

The octet rule states that most elements need 8 valence electrons to achieve a stable electron configuration.

Front

How do you represent valence electrons in Lewis dot structures?

Back

Valence electrons are represented as dots around the chemical symbol of an element in Lewis dot structures.

Front

What is the Lewis dot structure for a diatomic molecule like fluorine (F₂)?

Back

In the Lewis dot structure for F₂, each fluorine atom shares one pair of electrons, resulting in a single bond.

Front

How do you adjust the total number of valence electrons for a negatively charged ion?

Back

For a negatively charged ion, you add the charge value to the total number of valence electrons.

Front

What is the Lewis structure for the compound phosphorus tribromide (PBr₃)?

Back

The correct Lewis structure for PBr₃ shows phosphorus in the center with three bromine atoms bonded to it.

Front

How many unshared pairs of electrons does oxygen have in the Lewis structure of water (H₂O)?

Back

In the Lewis structure of water, oxygen has 2 unshared pairs of electrons.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs represent unshared pairs of electrons that can affect the shape and reactivity of molecules.

Front

What is the difference between ionic and covalent bonds in terms of electron sharing?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

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

Back

To determine the total number of valence electrons, sum the valence electrons of all atoms in the molecule.

Front

What is a resonance structure in the context of Lewis structures?

Back

A resonance structure is one of two or more valid Lewis structures that represent the same molecule, differing only in the placement of electrons.