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| the statement that there is a periodic repetition of chemical and physical properties of the elements when they are arranged by increasing atomic number |
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| a series of columns; families |
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| the elements in groups 1,2, and 13 to 18 possess a wide range of chemical and physical properties |
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| the elements in groups 3 to 12; elements a re classified as metals, non-metals, and metalloids |
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| elements that are generally shiny when smooth and clean, solid at room temperature, and good conductors of heat and electricity |
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| group 1 elements, except for hydrogen, they are reactive and usually exist as compounds with other elements |
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| group 2 elements in the modern periodic table and are highly reactive |
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| an element in groups 3-12 that is contained in the d-block of the periodic table and,with some exceptions, is characterized by a filled outermost s orbital of energy level n , and filled or partially filled d orbitals of energy levl n-1 |
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| a type of group B elemntcontained that is in the f-block of the periodic table and is characterized by afilled outermost orbital, and filled or partially 4f and 5f orbitals |
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| the f- block elements from period 6 that follow the element lanthanum |
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| the f-block elements from period 7 that follow the elements actinium |
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| elemenst that are generally gases or dull, brittle solids that are poor conductors of heat and electricity |
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| a highly reactive group 17 element |
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| an extremely unreactive group 18 element |
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| an element that has physical and chemical properties of both metals and nonmetals |
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| an atom or bonded group of atoms with a positive or negative charge |
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| the energy required to remove an electron from a gaseous atom |
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| states that atoms lose,gain, or share electron in order acquire the stable electron configuration of a nolbe gas |
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| indicates the relative ability of an element's atoms to attract electrons in a chemical bond |
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