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30 Cards in this Set

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