Chapter 2 Biology Count.

Front 1

A _____ forms when electrons are shared between atoms.

Back 1

covalent bonds

Front 2

The _____ is the smallest unit of most compounds.

Back 2

molecule

Front 3

An _____ is formed when one or more elctrons are transferred from one atom to another.

Back 3

ionic bond

Front 4

Positively and negatively charged atoms are _____

Back 4

ions

Front 5

intermolecular forces of attraction ______

Back 5

van der Waals forces

Front 6

A chemical _____ is a substance formed by the chemical combination of two or more elements in definite proportions.

Back 6

compound

Front 7

_____ is an attraction between molecules of the same substance

Back 7

cohesion

Front 8

_____ is an attraction between molecules of different substances

Back 8

adhesion

Front 9

A _____ is a material composed of two or more elements or compunds that are physically mixed together but not chemically combined

Back 9

mixture

Front 10

_____ indicates the concentration of H+ ions in a solution

Back 10

pH scale

Front 11

_____ are weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH

Back 11

buffers

Front 12

All of the components of a ____ are evenly distributed thorughout the solution

Back 12

solution

Front 13

macromolecules are formed by a process called _____.

Back 13

polymerization

Front 14

smaller units, _____, join together to form ____

Back 14

monomers, polymers

Front 15

Two kinds of nucleic acids: ____ and _____

Back 15

DNA, RNA