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8th Unit 7a

Nature of Matter Key Terms part 1

TermDefinition
Electron Cloud The part of an Electron that contains all of the orbiting electrons
Element The Simplest type of substance made up of only one type of atom
Orbit To revolve around something, such as electrons revolving around the nucleus
Matter Anything that has mass and takes up space
Neutral Neither positive nor negative
Nucleus The central part of an atom that contains the protons and neutrons
Bond Something that binds or joins two things together
Compound A Substance made up of two or more different types of atoms
Model A structure built to represent something else for the purpose of study
Product A chemical substance formed as a result of a chemical reaction
Reactant An original substance involved in a Chemical reaction
Mixture A physical combination of two or more subatances
Pure Substance A substance made up of all the same type of atom or all the same type of molicule
Molecule Two or more atoms bonded together
Property A characteristic of something
Chemical Property A property that describes the potential to undergo some kind of chemical change
Physical Property A property that can be observed without chemically altering a substance
Acid A substance with a pH lower than 7
Bace A substance with a pH higher than 7
Magnetic A force field capable of attracting iron and steel objects
Physical Change A change that does not involve the breaking nor the forming of chemical bonds.
Chemical Change A change that occurs when chemical bonds are formed or broken to create new substances.
Chemical Bond An attractive force linking atoms
Substance Matter; a physical material
Dissolve To mix with a liquid and pass into solution
Evaporate To convert or change from a liquid to a vapor (gas)
Periodic Table An arrangement of elements according to their atomic numbers
Atomic Number The number of protons in an atom
Chemical Symbol The short abbreviation for the name of a chemical element
Atomic Mass The number of protons plus the number of neutrons in an atom
Horizontal Flat or level; parallel to the ground
Vertical Upright; perpendicular to the horizon
Group Vertical column in the periodic table
Period Horizontal row in the periodic table
Metal An element that is ductile, malleable, and conducts heat and electricity.
Nonmetal An element that is not a conductor of heat or electricity lacks al
Metalloid An element having some, but not all, the properties of a metal
Malleable Can be hammered or pressed into thin sheets without breaking
Ductile Can easily be drawn into wire
Conductor A material or an object that can
Density The amount of matter per unit volume; m/V where m=mass and V=Volume
Created by: darrin_evans