6 1 Searching For an Organizing Principle How

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6. 1 Searching For an Organizing Principle How did chemists begin to organize the

6. 1 Searching For an Organizing Principle How did chemists begin to organize the known elements?

6. 1 Searching For an Organizing Principle Chemists used the properties of elements to

6. 1 Searching For an Organizing Principle Chemists used the properties of elements to sort them into groups.

6. 1 Searching For an Organizing Principle Chlorine, bromine, and iodine have very similar

6. 1 Searching For an Organizing Principle Chlorine, bromine, and iodine have very similar chemical properties.

6. 1 Mendeleev’s Periodic Table How did Mendeleev organize his periodic table?

6. 1 Mendeleev’s Periodic Table How did Mendeleev organize his periodic table?

6. 1 Mendeleev’s Periodic Table Mendeleev arranged the elements in his periodic table in

6. 1 Mendeleev’s Periodic Table Mendeleev arranged the elements in his periodic table in order of increasing atomic mass. The periodic table can be used to predict the properties of undiscovered elements.

6. 1 Mendeleev’s Periodic Table An Early Version of Mendeleev’s Periodic Table

6. 1 Mendeleev’s Periodic Table An Early Version of Mendeleev’s Periodic Table

6. 1 The Periodic Law How is the modern periodic table organized?

6. 1 The Periodic Law How is the modern periodic table organized?

6. 1 The Periodic Law In the modern periodic table, elements are arranged in

6. 1 The Periodic Law In the modern periodic table, elements are arranged in order of increasing atomic number.

6. 1 The Periodic Law The periodic law: When elements are arranged in order

6. 1 The Periodic Law The periodic law: When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties. • The properties of the elements within a period change as you move across a period from left to right. • The pattern of properties within a period repeats as you move from one period to the next.

6. 1 Metals, Nonmetals, and Metalloids What are three broad classes of elements?

6. 1 Metals, Nonmetals, and Metalloids What are three broad classes of elements?

6. 1 Metals, Nonmetals, and Metalloids Three classes of elements are metals, nonmetals, and

6. 1 Metals, Nonmetals, and Metalloids Three classes of elements are metals, nonmetals, and metalloids. Across a period, the properties of elements become less metallic and more nonmetallic.

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals, Metalloids, and Nonmetals in the Periodic Table

6. 1 Metals, Nonmetals, and Metalloids Metals are good conductors of heat and electric

6. 1 Metals, Nonmetals, and Metalloids Metals are good conductors of heat and electric current. • 80% of elements are metals. • Metals have a high luster, are ductile, and are malleable.

6. 1 Metals, Nonmetals, and Metalloids Uses of Iron, Copper, and Aluminum

6. 1 Metals, Nonmetals, and Metalloids Uses of Iron, Copper, and Aluminum

6. 1 Metals, Nonmetals, and Metalloids Uses of Iron, Copper, and Aluminum

6. 1 Metals, Nonmetals, and Metalloids Uses of Iron, Copper, and Aluminum

6. 1 Metals, Nonmetals, and Metalloids Uses of Iron, Copper, and Aluminum

6. 1 Metals, Nonmetals, and Metalloids Uses of Iron, Copper, and Aluminum

6. 1 Metals, Nonmetals, and Metalloids Nonmetals In general, nonmetals are poor conductors of

6. 1 Metals, Nonmetals, and Metalloids Nonmetals In general, nonmetals are poor conductors of heat and electric current. • Most nonmetals are gases at room temperature. • A few nonmetals are solids, such as sulfur and phosphorus. • One nonmetal, bromine, is a dark-red liquid.

6. 1 Metals, Nonmetals, and Metalloids A metalloid generally has properties that are similar

6. 1 Metals, Nonmetals, and Metalloids A metalloid generally has properties that are similar to those of metals and nonmetals. The behavior of a metalloid can be controlled by changing conditions.

6. 1 Metals, Nonmetals, and Metalloids If a small amount of boron is mixed

6. 1 Metals, Nonmetals, and Metalloids If a small amount of boron is mixed with silicon, the mixture is a good conductor of electric current. Silicon can be cut into wafers, and used to make computer chips.

6. 1 Section Quiz 1. The modern periodic table has elements arranged in order

6. 1 Section Quiz 1. The modern periodic table has elements arranged in order of a. colors. b. melting and boiling points. c. increasing atomic mass. d. increasing atomic number.

6. 1 Section Quiz 2. Mendeleev arranged the elements in his periodic table in

6. 1 Section Quiz 2. Mendeleev arranged the elements in his periodic table in order of increasing a. atomic number. b. number of protons. c. number of electrons. d. atomic mass

6. 1 Section Quiz 3. Which one of the following is NOT a general

6. 1 Section Quiz 3. Which one of the following is NOT a general property of metals? a. ductility b. malleability c. having a high luster d. poor conductor of heat and electricity

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