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30 Cards in this Set
- Front
- Back
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Matter
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Stubstance of which an object is made.
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Physical Properties
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Properties that can be observed
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Chemical Properties
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How stubstace reacts with other stubstances.
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Atom
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Smallest unit of an element
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Electrons
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Negative electrical charge
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Protons
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Carry positive electrical charge
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Neutrons
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Carry negative electrical charge.
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Nucleus
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Small region in center of an atom.
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Electron Cloud
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Region of space where electrons move around an atom.
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Atomic Number
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It is equal to how many protons an element has.
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Periodic Table
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A system for classifying elements
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Mass Number
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Represents the number of protons and neutrons
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Isotopes
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Atoms of the same element that differ from each other in mass number.
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Solid
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Has definate shape and volume
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Liquid
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Has indefinate shap and definate volume
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Gas
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Has no definate volume or shape
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Compound
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Two atoms chemically united
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Molecule
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Smallest complete unit of a compound
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Diatomic Molecules
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Molecules made up of two atoms
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Energy Levels
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Levels of energy where electrons are arranged.
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Chemical Bonds
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Force that holds combined atoms together.
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Ionic Compound
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Compound formed through the transfer of electrons
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Ion
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Atom that carries an electric charge
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Covalent Bond
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Atoms that share electrons
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Covalent Compound
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Compund formed by the sharing of electrons. Ex. Water
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Chemical Formula
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Indicates what elements a compound contains
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Mixture
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A material that contains two or more substances that are not combined
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Smog
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Unhealthy mixture caused by pollution
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Solution
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Mixture where one substance is uniformly dispered in another
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Alloy
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Solution of two or more metals
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