Chemical Bonding and Lewis Structures

Covalent Bonds

Formed by sharing of electrons by at least two atoms.

Ionic Bonds

Formed when there is a complete transfer of at least one electron from one atom to another.

Covalent Bonds

The particles involved are Neutral atoms.

Ionic Bonds

The particles involved are cations and anions.

Covalent Bonds

The weaker type of bond.

Ionic Bonds

One of the strongest bonds.

Covalent Bonds

Only nonmetals are involved in this bond.

Ionic Bonds

Nonmetals and metals are involved in this bond.

Lewis Dot Symbol

Consists of the symbol of an element and one dot for each valence electron in an atom of an element.

Electronegativity

Ability of an atom to attract one or more electrons towards itself.

Polar Bond

The electrons spend more time in the vicinity of one atom than the other.

red; blue

In electronegativity, the most electron-rich region is (color) and the least electron-rich region is (color).

2.0 > ΔEN > 0.4

Range for a Polar Covalent Bond

ΔEN ≤ 0.4

Range for a Noncovalent Polar Bond

Formal Charges

The electrical charge difference between the valence electrons in an isolated atom and the number of electrons assigned to that atom in a Lewis Structure.

Resonance Structure

One or two more Lewis Structures for a single molecule that cannot be represented accurately by only one Lewis Structure.