Biology - Chapter 5 Vocabulary

Front

chemical bond

Back

the attractive force that holds atoms or ions together

Front

covalent bond

Back

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

Front

element

Back

A pure substance made of only one kind of atom

Front

hydrogen bond

Back

weak attraction between a hydrogen atom and another atom

Front

Ion

Back

An atom or group of atoms that has a positive or negative charge.

Front

ionic bond

Back

Formed when one or more electrons are transferred from one atom to another

Front

Isotope

Back

Atoms of the same element that have different numbers of neutrons

Front

nonpolar

Back

No partial charges. Do not mix with water.

Front

polar

Back

Molecule with partial charges. Mixes with water.

Front

Acid

Back

compound that forms hydrogen ions (H+) in solution. pH less than 7