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Published byGary Miles Modified over 10 years ago
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Element Groupings
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I. Alkali Metals A.Group 1A on the periodic table B.Are extremely reactive C.Have one valence electron D.Reactivity increases from top to bottom.
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II. Alkaline Earth Metals A.Group 2A on the periodic table B.Are moderately reactive C.Have two valence electrons D.Ca and Mg are important biologically in construction and transportation
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III. Transition Metals A.Found between groups 2A and 3A B.Properties vary C.Form brightly colored compounds
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IV. Boron Family A.Group 3A on the periodic table B.Members have 3 valence electrons C.Aluminum is the most abundant metal on Earth. Third overall.
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V. Carbon Family A.Group 4A on the periodic table B.Members have 4 valence electrons C.Carbon containing compounds drive life on earth. (organic) D.Si is the 2 nd most abundant element on earth
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VI. Nitrogen Family A.Group 5A on the periodic table B.Members have 5 valence electrons C.Nitrogen is the most abundant element in the earth’s atmosphere D.N and P are essential for plant growth
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VII. Oxygen Family A.Group 6A on the periodic table B.Members have 6 valence electrons C.Oxygen combines with metals to form oxides (rust). It is moderately reactive. D.Most abundant element on earth is oxygen.
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VIII. Halogens (salt formers) A.Group 7A on the periodic table B.Members have 7 valence electrons C.Combine with metals to form salts D.Most reactive of the nonmetals E.Reactivity decreases from top to bottom.
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IX. Noble Gases A.Group 8A on the periodic table B.Members have 8 valence electrons (except He). C.Are extremely nonreactive or inert D.Are odorless and colorless
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X. Rare Earth Elements A.Lanthanide Series- elements 57-70 B.Actinide Series- elements 89-102 C.Many are not natural and radioactive
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That’s All Folks
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