Lecture Two: Polar Covalent Bonds and Hydrogen Bonding

Vocabulary flashcards covering polar covalent bonds, electronegativity, water polarity, partial charges, and hydrogen bonding from Lecture Two.

Polar covalent bonds

Bonds in which electrons are not shared equally between atoms, creating partial charges; in water, oxygen is more electronegative than hydrogen.

Electronegativity

The tendency of an atom to attract electrons toward itself in a chemical bond; in water, oxygen is more electronegative than hydrogen.

Water (H2O)

A molecule with two hydrogen atoms bonded to one oxygen; its O–H bonds are polar, giving rise to partial charges.

Partial negative charge

A partial negative charge on an atom caused by unequal sharing of electrons in a polar covalent bond; in water, oxygen carries this charge.

Partial positive charge

A partial positive charge on an atom caused by unequal sharing of electrons in a polar covalent bond; in water, hydrogen carries this charge.

Hydrogen bond

A weak attraction between a partially negative atom (often oxygen) in one molecule and a partially positive hydrogen atom in another molecule.