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The Periodic Table PART I: HISTORY AND FAMILIES ON THE PERIODIC TABLE
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The originator of the periodic table was Russian chemist Dmitri Mendeleev (1834-1907). HISTORY OF THE TABLE, PART I
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He originally ordered the periodic table by increasing atomic mass, with elements having common properties under each other.
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A copy of the first periodic table:
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HISTORY OF THE TABLE, PART II The next person to improve on the periodic table was Henry Mosley.
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HISTORY OF THE TABLE, PART II He had the idea to order the table based on the atomic number, instead of the mass, giving us a table much like the one we now have today!
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Periodic Law When the elements are arranged in order of atomic number, there is a periodic repetition of their chemical and physical properties. This is called the Periodic Law.
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Breakdown of the Periodic Table The periodic table is broken down into rows, called periods, And columns called groups or families.
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Period
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Group
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Representative Elements All of the elements found in the s-orbital and p-orbital areas are called the representative elements.
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Representative Elements
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Metals and Nonmetals Metals are found on the left side of the periodic table and nonmetals are on the right.
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Metals and Nonmetals Metals Non-metals Metals
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Metals have a high electrical conductivity and a high luster when clean. They are ductile and malleable.
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Metals and Nonmetals Nonmetals are generally non-lustrous and are poor conductors of electricity.
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Metalloids Metalloids show properties of both metals and nonmetals—they are on both sides of the metal/nonmetal line.
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Metalloids
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Alkali Metals Group 1A is called the Alkali Metals These are the most reactive elements on the periodic table.
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Alkaline Earth Metals Next to the alkali metals are the alkaline earth metals
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Other Metals Other metals include transition metals, inner transition metals (a.k.a. rare earth metals) and other metals.
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Other Metals Transition Metals Inner Transition Metals OtherMetals
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There are 2 categories inside the inner transition metal group: The Lanthanide Series, which is the top row in the inner transition metal, and the Actinide Series which is the second row.
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Lanthanide
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Actanide
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Halogens Halogens are a group of reactive non-metals.
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Noble Gases Noble Gases are the last column of the periodic table.
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Noble Gases Noble gases are special because they are unreactive. This is because they have a completely full outside energy level, making them more stable than other elements.
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Carbon, Nitrogen,Oxygen Families Because of the fact that some are metals and some are nonmetals, they don’t have as many similar properties.
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Carbon, Nitrogen & Oxygen Families C a r b o n Family N i t r o g e n Family O x y g e n Family
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You now have all the material that you will need for Wednesday’s Test. The worksheet is due tomorrow before the quiz.
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