1. Chapter 6 The Periodic Table 6.1 Organizing the Elements
6.2 Classifying the Elements
6.3 Periodic Trends
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2. Do Now: How many different ways can your group sort a deck of cards?
CHEMISTRY & YOU
Do Now:
How many different ways can your group sort a deck of cards?
Be prepared to discuss the classification system your group came up with.
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3. Mendeleev’s Periodic Table
Mendeleev arranged elements in order of increasing atomic mass.
Elements with similar properties were put in the same row.
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4. Today’s Periodic Table
In the modern periodic table, elements are arranged in order of increasing atomic number.
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5. Today’s Periodic Table
Horizontal row
Corresponds to a principal energy level.
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6. Today’s Periodic Table
Group
Vertical column
Elements in a group have similar chemical and physical properties.
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7. Mendeleev’s Periodic Table
Periodic Law
When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties
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8. Do Now: Fill in a Venn Diagram for Metals & Nonmetals Metals
CHEMISTRY & YOU
Do Now:
Fill in a Venn Diagram for Metals & Nonmetals
Metals
Non-Metals
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9. Metals, Nonmetals, and Metalloids
yellow squares
most elements are metals (~80%).
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10. Metals, Nonmetals, and Metalloids
Malleable – can be hammered into sheets
Ductile – can be drawn into wires
Good conductors of heat & electric current
Solids at room temp., except mercury (Hg).
Shiny
Hard
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11. Metals, Nonmetals, and Metalloids
Blue is used to identify the nonmetals.
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12. Metals, Nonmetals, and Metalloids
Properties are opposite to those of metals.
Poor conductors of heat and electricity.
Solid nonmetals tend to be brittle
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13. Metals, Nonmetals, and Metalloids
A heavy stair-step line separates metals from nonmetals.
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14. Metals, Nonmetals, and Metalloids
Properties can be similar to metals and nonmetals.
Under some conditions, metalloids behave like metals. Under others, they behave like nonmetals.
Behavior can be controlled by changing the conditions.
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