A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.
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Basic Anhydride
The oxide of a metal that reacts with water to form a base.
Solution
Homogeneous mixture of two or more substances.
Semipermable Membrane
A thin partition between two solutions through which certain molecules can pass but others cannot.
Periodic Table
An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.
Colligative Properties
Physical properties of solutions that depend upon the number but not the kind of solute particles present.
Isomorphous
Refers to crystals having the same atomic arrangement.
Photon
A packet of light or electromagnetic radiation, also called quantum of light.
Beta Particle
Electron emitted from the nucleus when a neuton decays to a proton and an electron.
Osmosis
The process by which solvent molecules pass through a semipermable membrane from a dilute solution into a more concentrated solution.
Dipole
Refers to the separation of charge between two covalently bonded atoms.
