Which statement best describes the difference between an element and a molecule?
a. An element is composed of atoms; a molecule is not.
b. An element is composed of only one kind of atom; molecules can be composed of more than one kind of atom.
c. An element is unstable; molecules are stable.
d. Elements always have lower atomic weights that molecules.
e. Elements exist in nature only as parts of molecules.
Answer: b. An element is composed of only one kind of atom; molecules can be composed of more than one kind of atom.