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Vocabulary
Cumulative Vocabulary List for part 1 on 10/19/15
Term | Definition |
---|---|
Anion | A negative ion formed by gaining electrons. |
Cation | A positive ion formed by giving electrons. |
Dissociation | The splitting of a molecule into smaller molecules, atoms, or ions, especially by a reversible process. |
Ionization | The process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions. |
Buffer | A solution that resists changes in pH when acid is added to it. |
SI Unit | A system of physical units ( SI Units ) based on the meter, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten. |
Absolute Zero | The temperature (-273.15C) at which all motion in matter stops and is thought to be unreachable. |
Endothermic | A chemical reaction which absorbs heat. |
Exothermic | A chemical reaction which releases heat. |
Polyatomic Ion | A charged ion composed of two or more atoms bonded to each other with a covalent bond. |