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15 Cards in this Set
- Front
- Back
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Atom
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The smallest particle of an element that still retains the properties of the element
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Atomic Number
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Number of protons in an atom's nucleus
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Average Atomic Mass
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Weighted-average mass of a mixture of an element's isotopes
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Electron
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Particles surrounding the center of a atom that have a charge of 1-
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Electron Cloud
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Area around the nucleus of an atom where the atom's electrons are most likely to be found
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Electron Dot Diagram
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Uses the symbol for an element an dots representing the number of electrons in the outer energy level
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Group
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Vertical column in the periodic table
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Isotope
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Atoms of the same element that have different numbers of neutrons
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Mass Number
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Sum of the number of protons and neutrons in an atom's nucleus
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Neutron
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Neutral particle, composed of quarks, inside the nucleus of an atoms
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Nucleus
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Positively charged center of an atom that contains protons and neutrons and is surrounded by a cloud of electrons
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Period
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Horizontal row in the periodic table
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Periodic Table
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Organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties
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Proton
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particle, composed of quarks, inside the nucleus of an atom that has a charge of 1+
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Quark
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Particles of matter that make up protons and neutrons
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