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Periodic Table

Metals, Nonmetals, & Metalloids (6.5A)

TermDefinition
Periodic Table of Elements A table in which all the know elements are arranged by properties and are represented by one or two letters, referred to as chemical symbols.
Elements A pure substance composed of the same type of atom throughout.
Classify/Classification Sort or put into groups based on similar and dissimilar physical, chemical, or biological characteristics.
Metals Most elements are metals; they are typically solid, shiny, malleable, and good conductiors of heat and electricity.
NonMetals Elements that are typically not shiny, not malleable, and poor conductors of heat and electricity; usually gases and brittle solids.
Metalloids Elements that have properities of both metals and nonmetals; sometimes referred to as simiconductors.
Rare Earth Elements It is 17 metallic elements; located in the middle of the periodic table (atomic numbers 21, 39, and 57–71.)
Physical Properties Characteristics that can be observed or measured without changing the substance; for example, color, melting point, or conductivity.
Luster The way the surface of a mineral reflects light; either metallic or non-metallic such as silky, dull, glassy, or resinous.
Malleability The ability of something to be reshaped without breaking.
Brittle A tendency to break rather than flex or bend.
Ductile The ability to be stretched in to wire.
Semiconductor A substance that shows the property of electrical conductivity between that of a conductor and that of an insulator; the foundation of modern electronics.
Conductor A substance that readily transfers heat or electrical energy.
Insulator A material that does not conduct heat or electrical current.
Precipitate When a is solid formed due to a chemical reaction of liquids.
Magnetism A force that can attract or repel certain materials, like iron.
Thermal Energy It is the internal energy of a system that results from the kinetic energy of its atoms and molecules.
Matter Anything that has mass and takes up space.
Created by: user-1858187
 

 



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