Atoms often join with one another in various combinations in distinct
molecules or in repeating three-dimensional crystal patterns. An enormous
variety of biological, chemical, and physical phenomena can be explained
by changes in the arrangement and motion of atoms and molecules.
| NSES Content Standard B
Physical Science: Structure and properties of matter Grades 9-12, page 179 Bonds between atoms are created when electrons are paired up by being transferred or shared. A substance composed of a single kind of atom is called an element. The atoms may be bonded together into molecules or crystalline solids. A compound is formed when two or more kinds of atoms bind together chemically. |