Chemistry 8.4

The attractions between opposite poles of polar molecules are called _____.

Dipole

The degree of polarity of a bond between any two atoms is determined by consulting a table of _____.

Electronegativities

When like atoms are joined by a covalent bond, the bonding electrons are shared _____, and the bond is _____.

Equally; nonpolar

What kind of a bond is NO2?

Polar

What kind of a bond is SO2?

Polar

A bond formed when two different atoms are joined by a covalent bond and the bonding electrons are shared unequally

Polar covalent bond

A molecule in which one end is slightly positive and the other end is slightly negative

Polar molecule

A/S/NT: A molecule with polar bonds is dipolar.

ST

A/S/NT: Covalent compounds are network solids.

ST

When the atoms in a bond are not the same, the bonding electrons are shared _____, and the bond is _____.

Unequally; polar

A term used to describe the weakest intermolecular attractions; these include dispersion forces and dipole interactions

Van Der Waals forces

A substance in which all of the atoms are covalently bonded to each other

Network solid

What kind of a bond is Cl2?

Nonpolar

A bond formed when the atoms in a molecule are alike and the bonding electrons are shared equally

Nonpolar covalent bond

A/S/NT: Dispersion forces are weaker than hydrogen bonds.

AT

A/S/NT: If the electronegativity difference between two atoms is greater than 2.0, they will form an ionic bond

AT

A/S/NT: In general, the electronegativity values of nonmetallic elements are greater than the electronegativity values of metallic elements.

AT

Another strong intermolecular attractive force is the ____ ____, in which a hydrogen covalently bonded to a very _____ atom, such as ___ ___ ___, is also weakly bonded to an unshared electron pair of another electronegative atom.

Hydrogen bond; electronegative; oxygen-nitrogen-fluorine

Arrange the following intermolecular attractions in order of increasing strength: dipole interactions, dispersion forces, and hydrogen bonds

Hydrogen bonds, dipole interactions, dispersion forces

What kind of a bond is KF?

Ionic

A/S/NT: In a polar covalent bond, the more electronegative atom has a slight positive charge.

NT