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28 Cards in this Set
- Front
- Back
Conversion factor
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a ratio of equivalent measurements used to convert a quantity fromone unit to another
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Dimensional Analysis
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a technique of problem solving that uses the units that are part ofa measurement to help solve the problem
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Alkali Metal
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any metal in group 1A of the periodic table
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Alkaline earth Metals
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Any metal in groups 2A of the periodic table
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Atom
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the smallest particle of an element that retains the properties ofthat element
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Atomic Mass
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the weighted average of the masses of the isotopes of an element
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atomic mass unit (amu)
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a unit of mass equal to one twelfth the mass of a carbon-12 atom
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Atomic Number
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The number of protons in the nucleus of an atom of an element
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Cathode Ray
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a stream of electrons produced at the negative electrode (cathode)of a tube containing a gas at low pressure
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Dalton's Atomic Theory
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the first theory to relate chemical changes to events at the atomiclevel
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Electron
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a negatively charged subatomic particle
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Group
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a vertical column of elements in the periodic table; the constituentelements of a group have similar chemical and physical properties
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Halogen
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any member of the non-metallic elements in Group 7A of the periodictable
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Inner Transition Metal
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an element on the lanthanide and actinide series; characterized byaddition of electrons to f orbi
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Isotope
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atoms of the same element that have the same atomic number butdifferent atomic masses sue to a different number of neutrons
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Mass Number
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the total number of protons and neutrons in the nucleus of an atom
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Metal
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one of a class of elements that includes a large majority of theknows elements, metals are characteristically lustrous, malleable,ductile, and good conductors of heat and electricity
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Metalloid
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one of a class of elements having properties intermediate to metalsand nonmetals
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Neutron
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a subatomic particle with no charge and a mass of 1 amu; found in the nucleus of the atom
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noble gas
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any member of a group of gaseous element in group 0 of the periodictable; the s and p sublevles of theiroutermost energy level are filled
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nonmetal
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one of a class of elements that are not lustrous and are generallypoor conductors of heat and electricity; non metals are grouped onthe right side of the periodic table
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nucleus
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the dense central portion of an atom, composed of protons andneutrons
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Period
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a horizontal row of elements on the periodic table
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periodic law
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when the elements are arranged in order of increasing atomic number,there is a periodic repetition of their physical and chemicalproperties
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Periodic table
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an arrangement of elements into rows and columns according tosimilarities in their properties
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Proton
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a positively charged subatomic particle found in the nucleus of anatom
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Representative element
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Group A element on the periodic table; together, these elementswhich have only partially filled outermost s and p sublevels, illustrate the entire range ofchemical properties
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Transition metals
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Group B element characterized by addition of electrons to d suborbitals
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