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1
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The element with the highest electronegativity.
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4
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Elements in the same group have the same number of _________ valence electrons.
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5
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Person credited with organizing the modern periodic table.
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7
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Half of the distance between nuclei of identical chemically bonded atoms.
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9
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The actinides are all __________ .
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11
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Elements to the right of the staircase are called _______ .
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12
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Another name for group 2 metals.
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13
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Atoms tend to gain or lose electrons to form _____ .
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14
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The periodic law states that patters repeat themselves when elements are arranged in order of ________ atomic number.
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16
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_________ and actinides are part of the f-block.
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17
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Element with the highest ionization energy: oxygen, sulfur, or selenium.
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18
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An element with 3 valence electrons
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19
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The group that does not react.
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21
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The halogens have ___________ valence electrons.
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22
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The red form is used in matches.
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