Unit 04 Bonding Vocabulary

Front

Bent molecule

Back

Molecule with a bent shape; example: water or H₂O.

Front

Covalent bond

Back

Chemical bond formed by the sharing of one or more pairs of electrons between non-metals.

Front

Dipole-dipole

Back

Attractions between oppositely charged regions of polar molecules.

Front

Electronegativity Difference (E.N.D.)

Back

subtract the electronegativities of two atoms in a bond;

if the E.N.D. is >= 1.7, the bond is ionic;

if the E.N.D. <1.7, the bond is polar covalent;

if the E.N.D. is 0, the bond is nonpolar covalent.

Front

Endothermic

Back

when energy is absorbed & bonds are broken

Front

Exothermic

Back

when energy is released & bonds are formed

Front

Hydrogen bond

Back

The strongest of the weak attractive forces (IMFs) between molecules, existing between hydrogen of one molecule and either fluorine, oxygen, or nitrogen of another. H-bonding is FON!

Front

Intermolecular force

Back

Attractive forces that exist between molecules; influence physical properties such as melting point, boiling point, and surface tension.

Front

Ionic bond

Back

A bond formed between a metal and a non-metal when one or more electrons are transferred from one atom to another.

Front

Linear molecule

Back

When two atoms of different elements are bonded to make the model a straight line.