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12 Cards in this Set
- Front
- Back
radioactive elements with atomic numbers from 90-103
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The actinides
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Which two periods have the same number of elements
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4 and 5
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Elements to the right side of the periodic table (p block elements) have properties most associated with
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nonmetals
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Group 14 elements in the sixth period that have occupied 4f orbitals are the
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lanthanides
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Elements at the top of the table, compared with those at the bottom,
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are less metallic
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Periods with occupied f sublevels
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are not assigned group numbers
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the most reactive group of the nonmetals are the
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halogens
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The force of attraction by Group 1 metals for their valence electrons is
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weak
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Group 2 elements, the valence electrons are in the
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s sublevel
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Number of valence electrons in Group 17 elements is
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7
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In Groups 13-18 valence electrons may be in sublevels
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s and p
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First electrons to be removed when d-block elements form ions are the
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s electrons
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