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Related Flashcards
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Cards In This Set
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Proton
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A positively charged particle located in an atom's nucleus
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Neutron
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A particle that has no electric charge and is located in the nucleus
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Nucleus
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The central region of an atom where most of the atom's mass is found in protons and neutrons
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Electron
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A negatively charged particle located outside an atom's nucleus - an electron is about 2000 times smaller than either a proton or neutron.
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Atomic number
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The number of protons in the nucleus of an atom
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Atomic mass number
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The total number of protons and neutrons in an atom's nucleus
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Isotope
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An atom of one element that has a different number of neutrons than another atom of the same element
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Ion
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An atom or group of atoms that has a positive or negative electric charge
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Atomic mass
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The average mass of the atroms of an element
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Periodic Table
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A table of the elements, arranged by atomic number, that shows the patterns of their properties
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Period
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A horizontal row in the periodic table of the elements - elements in a period have varying properties
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Group
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A vertical column in the in the periodic table of the elements - elements in a group have similar properties
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Reactive
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Likely to undergo a chemical change
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Metal
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An element that tends to be shiny, easily shaped, and a good conductor of electricity and heat
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Nonmetal
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An element that is not a metal and has properties generally opposite to those of a metal
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