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Anything that occupies space and has mass
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Matter
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The quantity of matter an object has
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Mass
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Are pure substances that cannot be broken down chemically into smaller forms of matter
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Elements
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The simplest particle of an element that retains all of the properties of an element
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Atom
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The central core of an atom that consists of 2 kinds of particles
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Nucleus
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A positive electrical charge
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Proton
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No electrical charge
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Neutron
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The number of protons in an atom
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Atomic number
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The # of + charged protons balanced by an equal # of small, negatively charged particles
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Electron
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When electrons move fast around the nucleus
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Energy level
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A pure substance that is made up of atoms of 2 or more elements
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Compounds
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The process of breaking chemical bonds, forming new bonds, or both
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Chemical reaction
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When chemicals get attached to other chemicals; attachment
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Bonds
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Forms when 2 atoms share 1 or more pairs of atoms
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Covalent bonds
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Is the simplest part of substance that retains all of the properties of the substance ans that can exist in a free style
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Molecules
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