Glossary of chemistry
Chemistry
Chemistry (pronounced: kem-is-tree, from the Greek word khēmeía meaning "cast together") is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
Related terms: Physical Chemistry, Organic Chemistry, Inorganic Chemistry, Biochemistry, Analytical Chemistry
Atom
An atom (pronounced: a-tom, from the Greek word atomos meaning "indivisible") is the smallest unit of a chemical element that retains the properties of that element.
Related terms: Molecule, Ion, Element, Compound
Molecule
A molecule (pronounced: mol-e-cule, from the Latin word molecula meaning "small mass") is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound.
Related terms: Atom, Ion, Element, Compound
Ion
An ion (pronounced: i-on, from the Greek word iōn meaning "going") is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Related terms: Atom, Molecule, Element, Compound
Element
An element (pronounced: el-e-ment, from the Latin word elementum meaning "principle") is a substance whose atoms all have the same number of protons - i.e. the same atomic number.
Related terms: Atom, Molecule, Ion, Compound
Compound
A compound (pronounced: com-pound, from the Latin word componere meaning "put together") is a substance formed when two or more chemical elements are chemically bonded together.
Related terms: Atom, Molecule, Ion, Element
External links
- Medical encyclopedia article on Glossary of chemistry
- Wikipedia's article - Glossary of chemistry
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