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