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Metals, Nonmetals, and Metalloids (Vocabulary) Periodic Table of Elements A table in which all the known elements are arranged by properties and are represented by one or two letter chemical symbols. Metals Elements which have physical properties such as good conductivity, shiny luster, malleability and ductility. Nonmetals Elements which have physical properties such as no conductivity (an insulator), dull luster, and brittleness (will break). Metalloids Elements which can have both properties of metals and nonmetals. Also may be called a semi-conductor. Luster The way a substance reflects light. Examples •Shiny •Dull •Metallic •Waxy Malleability How well it can be hammered into thin sheets. Examples •Flattened penny •Aluminum can •Tin foil •Aluminum foil Brittle The tendency to break, snap, or crack without first bending or changing shape as a result of application of little force. Conductivity How well it allows electricity to move through. Ductility Can be stretched into wire. Magnetism Attracted to or repelled by a magnet. Sonorous An object that produces a sound when struck by another object. Conductor A material that conducts or transmits heat, electricity, or sound Insulator A substance that does not allow the heat or sound to pass through Semiconductor A substance that can conduct electricity or heat under some conditions but not others Density Formula D = mass/volume (I density) Water Displacement A method used to calculate the volume of an irregular shaped object. Volume Formula V=LxWxH