8.4 Polar Bonds and Molecules

When the atoms in a bond are not the same, the bonding electrons are shared _______, and the bond is ________. (electronegativities, equally, unequally, non polar, polar)

unequally, polar

A term used to describe the weakest intermolecular attractions; these include dispersion forces and dipole interactions. (nonpolar covalent bond, polar covalent bond, polar molecule, van der Waals forces, network solid)

van der Waals forces

The attractions between opposite poles of polar molecules are called _________. (electronegative, hydrogen bond, dipole interactions, oxygen-nitrogen-fluorine)

dipole interactions

In a hydrogen bond, a hydrogen covalently bonded to a very ___________ atom, such as ______, _______, or _______. (electronegative, hydrogen bond, dipole interactions, oxygen-nitrogen-fluorine)

electronegative oxygen-nitrogen-fluorine

The degree of polarity of a bond between any two atoms is determined by consulting a table of _________. (electronegativities, equally, unequally, non polar, polar)

electronegativities

When like atoms are joined by a covalent bond, the bonding electrons are shared ________, and the bond is ___________. (electronegativities, equally, unequally, non polar, polar)

equally, nonpolar

Another strong intermolecular attractive force is the _________. (electronegative, hydrogen bond, dipole interactions, oxygen-nitrogen-fluorine)

hydrogen bond

A substance in which all of the atoms are covalently bonded to each other. (nonpolar covalent bond, polar covalent bond, polar molecule, van der Waals forces, network solid)

network solid

A bond formed when the atoms in a molecule are alike and the bonding electrons are shared equally. (nonpolar covalent bond, polar covalent bond, polar molecule, van der Waals forces, network solid)

nonpolar covalent bond

A bond formed when two different atoms are joined by a covalent bond and the bonding electrons are shared unequally. (nonpolar covalent bond, polar covalent bond, polar molecule, van der Waals forces, network solid)

polar covalent bond

A molecule in which one end is slightly positive and the other end is slightly negative. (nonpolar covalent bond, polar covalent bond, polar molecule, van der Waals forces, network solid)

polar molecule

A molecule with polar bonds is dipolar.

Sometimes True

Covalent compounds are network solids.

Sometimes True

In a polar covalent bond, the more electronegative atom has a slight positive charge.

Never True

Dispersion forces are weaker than hydrogen bonds. (Always True, Never True, Sometimes True)

Always True

If the electronegativity difference between two atoms is greater than 2.0, they will form an ionic bond.

Always True

In general, the electronegativity values of nonmetallic elements are greater than the electronegativity values of metallic elements.

Always True